[J1]    Z. Liu, N. Niclausse, C. Jalpa-Villanueva, “Traffic Model and Performance Evaluation of Web Servers”, Performance Evaluation, Vol 46/2-3, pp 77-100, 2001.

[J2]    J. Blazewicz, Z. Liu, “Linear and Quadratic Algorithms for Scheduling Chains and Opposite Chains”, to appear in Europeen Journal of Operations Reserach.

[J3]    Z. Liu, R. Righter, “Optimal Parallel Processing of Random Task Graphs”, to appear in Journal of Scheduling.

[J4]    G. Koole, Z. Liu, R. Righter, “Optimal Transmission Policies for Noisy Channels”, Technical Report WS-515, Faculteit der EXacte Wetenschappen, Vrije Universiteit Amsterdam, 1999. to appear in Operations Research.
Preliminary version available in http://www.inria.fr/mistral/personnel/Zhen.Liu/Papers/noise.ps.gz

[J5]    J. Talim, Z. Liu, P. Nain, E. G. Coffman, Jr., “Optimizing the Number of Robots for Web Search Engines”, Telecommunication Systems, Vol. 17, pp. 243-264, 2001.
Preliminary version available in http: //www.inria.fr/mistral/personnel/Zhen.Liu/Papers/robot_num_ts.ps.gz

[J6]    E. Altman, Z. Liu, R. Righter, “Scheduling of Input-Queued Switch to Achieve Maximal Throughput”, Probability in the Engineering and Information Sciences, Vol. 327-334, 2000.
Preliminary version available in http: //www.inria.fr/mistral/personnel/Zhen.Liu/Papers/input_stab.ps.gz

[J7]    A. Hordijk, Z. Liu, D.Towsley, “Smoothing Effect of the Superposition of Homogeneous Sources in Tandem Networks”, Journal of the Applied Probability, Vol. 37, pp. 900-913, 2000. Vol. 37, No.3, september 2000.
Preliminary version available as INRIA RR, No. 3839, 1999.
http://www.inria.fr/RRRT/RR-3839.html

[J8]    Z. Liu, “Dynamic Scheduling of Parallel Computations”, Theoretical Computer Science, Vol. 246, pp. 239-252, 2000.
Preliminary version available as INRIA RR, No. 3048, 1996.
http://www.inria.fr/RRRT/RR-3048.html

[J9]    Z. Liu, R. Righter, “The Impact of Cell Dropping Policies in ATM Networks”, Operations Research, January-February 2001.
Preliminary version available as INRIA RR, No. 3047, 1996.
http://www.inria.fr/RRRT/RR-3047.html

[J10]    Z. Liu, P. Nain, D. Towsley, “On a Generalization of Kingman’s Bounds”, Mathematical Methods of Operations Research, Vol. 49, No. 2, pp. 325-333, 1999.
Preliminary version available as INRIA RR, No. 2423, 1994.
http://www.inria.fr/RRRT/RR-2423.html

[J11]    Z. Liu, R. Righter, “Scheduling Multicast Input-Queued ATM Switches”, Journal of Scheduling, Vol. 2, pp. 99--114, 1999.
Preliminary version available in http: //www.inria.fr/mistral/personnel/Zhen.Liu/Papers/multicast.ps.gz

[J12]    Z. Liu, P. Nain, D. Towsley, Z.-L. Zhang, “Asymptotic Behavior of a Multiplexer Fed by a Long-Range Dependent Process”, Journal of Applied Probability, Vol. 36, No. 1, pp. 105-118, March 1999.
Preliminary version available in http://www.inria.fr/mistral/personnel/Zhen.Liu/Papers/mg_infty.ps.gz

[J13]    Z. Liu, R. Righter, “Optimal Load Balancing on Distributed Homogeneous Unreliable Processors”, Operations Research, Vol. 46, No. 4, pp. 563-573, August 1998.
Preliminary version available as INRIA RR, No. 2659, 1995.
http://www.inria.fr/RRRT/RR-2659.html

[J14]    Z.-L. Zhang, Z. Liu, D. Towsley, “Closed-Form Deterministic End-to-End Performance Bounds for the Generalized Processor Sharing Scheduling Discipline”, Journal of Combinatorial Optimization, special issue on Scheduling. Vol. 1, No.4, pp. 457-481, 1998.
Preliminary version available in http://www.inria.fr/mistral/personnel/Zhen.Liu/Papers/gps_e2e.ps.gz

[J15]    Z. Liu, “Performance Analysis of Stochastic Timed Petri Nets using Linear Programming Approach”, IEEE Trans. on Software Engineering, Vol. 24, No. 11, pp. 1014-1030, November 1998.
Preliminary version available as INRIA RR, No. 2642, 1995.
http://www.inria.fr/RRRT/RR-2642.html

[J16]    E. G. Coffman, Z. Liu, R. Weber, “Optimal Robot Scheduling for Web Search Engines”, Journal of Scheduling, Vol. 1, pp. 15-29, 1998.
Preliminary version available as INRIA RR, No. 3317, 1997.
http://www.inria.fr/RRRT/RR-3317.html

[J17]    A. Jean-Marie, Z. Liu, P. Nain, D. Towsley, “Computational aspects of the workload distribution in the MMPP/GI/1 queue”, IEEE Journal on Selected Areas of Communications, Vol. 16, pp. 640--652, June 1998. Special issue on computational aspects of teletraffic models.
Preliminary version available in http://www.inria.fr/mistral/personnel/Zhen.Liu/Papers/mmpp_g_1.ps.gz

[J18]    Z. Liu, “Worst-Case Analysis of Scheduling Heuristics of Parallel Systems”, Parallel Computing, Vol. 24, issue 4-5, pp. 863-891, 1998.
Preliminary version available as INRIA RR, No. 2710, 1995.
http://www.inria.fr/RRRT/RR-2710.html

[J19]    A. Jean-Marie, S. Lefebvre-Barbaroux, Z. Liu, “An Analytical Approach to the Performance Evaluation of Master-Slave Computational Models”, Parallel Computing, Vol. 24, issue 4-5, pp. 841-862, 1998.
Preliminary version available in http: //www.inria.fr/mistral/personnel/Zhen.Liu/Papers/master_slave.ps.gz

[J20]    G. Koole, Z. Liu, “Stochastic Bounds for Queueing Systems with Multiple On-Off Sources”, Probability in the Engineering and Information Sciences, Vol. 12, pp. 25-48, Jan. 1998.
Preliminary version available in http://www.inria.fr/mistral/personnel/Zhen.Liu/Papers/on_off.ps.gz

[J21]    Z. Liu, P. Nain, D. Towsley, “Exponential Bounds with an Application to Call Admission” CMPSCI Technical Report 94-63, Univ. Massechusetts, 1994. Journal of the ACM, Vol. 44, No. 2, pp. 366-394, 1997.
Preliminary version available as INRIA RR, No. 2865, 1996.
http://www.inria.fr/RRRT/RR-2865.html

[J22]    J.-C. Bermond, Z. Liu, M. Syska, “Mean Eccentricities of de Bruijn Networks”, Networks, Vol. 30, pp. 187-203, 1997.
Preliminary version available as INRIA RR, No. 2114, 1993.
http://www.inria.fr/RRRT/RR-2114.html

[J23]    Y. Dallery, Z. Liu, D. Towsley, “Properties of Fork/Join Queueing Networks with Blocking under Various Operating Mechanisms”, IEEE Trans. on Robotics and Automation, Vol. 13, No. 4, pp. 503--518, Aug. 1997.
Preliminary version available in http://www.inria.fr/mistral/personnel/Zhen.Liu/Papers/bas.ps.gz

[J24]    Z.-L. Zhang, Z. Liu, J. Kurose, D. Towsley, “Call Admission Control Schemes under the Generalized Processor Sharing Scheduling Discipline”, Telecommunication Systems, Vol. 7, No. 1-3, pp. 125-152, July 1997.
Preliminary version available as INRIA RR, No. 2711, 1995.
http://www.inria.fr/RRRT/RR-2711.html

[J25]    L. Finta, Z. Liu, “Complexity of Task Graph Scheduling with Fixed Communication Capacity”, International Journal of Fondations of Computer Science, Vol. 8, No. 1 (1997), pp. 43-66.
Preliminary version available as INRIA RR, No. 2959, 1996.
http://www.inria.fr/RRRT/RR-2959.html

[J26]    Z. Liu, E. Sanlaville, “Stochastic Scheduling with Variable Profile and Precedence Constraints”, SIAM J. on Computing, Vol. 26, No. 1, pp. 173-187, 1997.
Preliminary version available as INRIA RR, No. 1525, 1991.
http://www.inria.fr/RRRT/RR-1525.html

[J27]    Z. Liu, R. Righter, “Optimal Scheduling on Parallel Processors under Precedence Constraints for General Costs”, Probability in the Engineering and Information Sciences, Vol. 11, pp. 79-93, Jan. 1997.
Preliminary version available in http://www.inria.fr/mistral/personnel/Zhen.Liu/Papers/prec_gen.ps.gz

[J28]    J. Blazewicz, Z. Liu, “Scheduling Multiprocessor Tasks with Chain Constraints”, European Journal on Operations Research, Vol. 94, pp. 231-241, 1996.
Preliminary version available in http: //www.inria.fr/mistral/personnel/Zhen.Liu/Papers/chain_task.ps.gz

[J29]    L. Finta, Z. Liu, “Single Machine Scheduling Subject to Precedence Delays”, Discrete Applied Mathematics, Vol. 70, pp. 247-266, 1996.
Preliminary version available as INRIA RR, No. 2198, 1994.
http://www.inria.fr/RRRT/RR-2198.html

[J30]    L. Finta, Z. Liu, I. Milis, E. Bampis, “Scheduling UET-UCT Series-Parallel Graphs on Two Processors”, Theoretical Computer Science, special issue on Parallelism and Irregularly Structured Problems, Vol. 162, pp. 323-340, July 1996.
Preliminary version available as INRIA RR, No. 2566, 1995.
http://www.inria.fr/RRRT/RR-2566.html

[J31]    Z. Liu, T. Y. Sung, “Routing and Transmitting Problems in de Bruijn Networks”, IEEE Trans. on Computers, Vol. 45, pp. 1056-1062, Sept. 1996.
Preliminary version available in http://www.inria.fr/mistral/personnel/Zhen.Liu/Papers/debruijn.ps.gz

[J32]    E. Altman, Z. Liu, “Improving the Stability Characteristics of Asynchronous Traffic in FDDI Token Ring”, Performance Evaluation, Vol. 26, pp. 219-234, 1996.
Preliminary version available as INRIA RR, No. 1934, 1993.
http://www.inria.fr/RRRT/RR-1934.html

[J33]    Z. Liu, P. Nain, D. Towsley, “Sample Path Methods in the Control of Queues”, Queueing Systems, Vol. 21, pp. 293-335, special issue on Optimal Control in Queueing Systems, 1995.
Preliminary version available as INRIA RR, No. 2457, 1995.
http://www.inria.fr/RRRT/RR-2457.html

[J34]    Z. Liu, E. Sanlaville, “Preemptive Scheduling with Variable Profile, Precedence Constraints and Due Dates”, Discrete Applied Mathematics, Vol. 58, pp. 253-280, April 1995.
Preliminary version available as INRIA RR, No. 1622, 1992.
http://www.inria.fr/RRRT/RR-1622.html

[J35]    Y. Dallery, Z. Liu, D. Towsley, “Equivalence, Reversibility and Symmetry Properties in Assembly/Disassembly Networks”, Journal of the ACM., Vol. 41, No. 5, pp. 903-942, 1994.
Preliminary version available as INRIA RR, No. 1267, 1990.
http://www.inria.fr/RRRT/RR-1267.html

[J36]    Z. Liu, D. Towsley, “Burst Reduction Properties of Rate-Based Flow Control Schemes: Downstream Queue Behavior”, IEEE/ACM Trans. on Networking, Vol. 3, No. 1, pp. 82-90, 1995.
Preliminary version available as INRIA RR, No. 2117, 1993.
http://www.inria.fr/RRRT/RR-2117.html

[J37]    Z. Liu, D. Towsley, “Optimality of the Round Robin Routing Policy”, Journal of the Applied Probability, Vol. 31, pp. 466-475, 1994.
Preliminary version available in http: //www.inria.fr/mistral/personnel/Zhen.Liu/Papers/rr_routing.ps.gz

[J38]    Z. Liu, D. Towsley, “Burst Reduction Properties of Rate-Based Flow Control Schemes: Departure Process”, Annals of Operations Research, Special Issue on Methodologies for Performance Analysis of High Speed Networks, Vol. 49, pp. 51-78, 1994.
Preliminary version available as INRIA RR, No. 2116, 1993.
http://www.inria.fr/RRRT/RR-2116.html

[J39]    Z. Liu, D. Towsley, “Effects of Service Disciplines in G/G/s Queueing Systems”, Annals of Operations Research, Vol. 48, pp. 401-429, 1994.
Preliminary version available in http://www.inria.fr/mistral/personnel/Zhen.Liu/Papers/ggs.ps.gz

[J40]    Z. Liu, D. Towsley, “Stochastic Scheduling in In-Forest Networks”, Advances in Applied Probability, Vol. 26, pp. 222-241, 1994.
Preliminary version available as INRIA RR, No. 1719, 1992.
http://www.inria.fr/RRRT/RR-1719.html

[J41]    F. Baccelli, Z. Liu, D. Towsley, “Extremal Scheduling of Parallel Processing Systems with and without Real-Time Constraints”, Journal of the ACM, Vol. 40, pp. 1209-1237, 1993.
Preliminary version available as INRIA RR, No. 1113, 1989.
http://www.inria.fr/RRRT/RR-1113.html

[J42]    F. Baccelli, Z. Liu, “Comparison Properties of Stochastic Decision Free Petri Nets”, IEEE Trans. on Automatic Control, Vol. 37, pp. 1905-1920, 1992.
Preliminary version available as INRIA RR, No. 1433, 1991.
http://www.inria.fr/RRRT/RR-1433.html

[J43]    A. Jean-Marie, Z. Liu, “Stochastic Comparisons for Queueing Models via Random Sums and Intervals”, Advances in Applied Probability, Vol. 24, pp. 960-985, 1992.
Preliminary version available as INRIA RR, No. 1422, 1991.
http://www.inria.fr/RRRT/RR-1422.html

[J44]    Z. Liu, P. Nain, D. Towsley, “On Optimal Polling Policies”, Queueing Systems, Vol. 11, pp. 59-83, 1992.
Preliminary version available as INRIA RR, No. 1541, 1991.
http://www.inria.fr/RRRT/RR-1541.html

[J45]    E. Altman, P. Konstantopoulos, Z. Liu, “Stability, Monotonicity and Invariant Quantities in General Polling Systems”, Queueing Systems, Vol. 11, pp. 35-57, 1992.
Preliminary version available as INRIA RR, No. 1596, 1992.
http://www.inria.fr/RRRT/RR-1596.html

[J46]    Z. Liu, F. Baccelli, “Generalized Precedence-Based Queueing Networks”, Mathematics of Operations Research, Vol. 17, pp. 615-639, 1992.

[J47]    F. Baccelli, Z. Liu, “On a Class of Stochastic Recursive Sequences Arising in Queueing Theory”, The Annals of Probability, Vol. 20, No. 1, pp. 350-374, 1992.
Preliminary version available as INRIA RR, No. 984, 1989.
http://www.inria.fr/RRRT/RR-984.html

[J48]    Z. Liu, P. Nain, “Optimal Scheduling in Some Multi-Queue Single-Server Systems”, IEEE Transactions on Automatic Control, Vol. 37, No. 2, pp. 247-252, 1992.
Preliminary version available as INRIA RR, No. 1147, 1989.
http://www.inria.fr/RRRT/RR-1147.html

[J49]    E. G. Coffman, Z. Liu, “On the Optimal Stochastic Scheduling of Out-Forests”, Operations Research, Vol. 40, Supp. No. 1, pp. S67-S75, Jan. 1992.
Preliminary version available as INRIA RR, No. 1156, 1990.
http://www.inria.fr/RRRT/RR-1156.html

[J50]    Z. Liu, P. Nain, “Sensitivity Results in Open, Closed, and Mixed Product-Form Queueing Networks”, Performance Evaluation, Vol. 13, pp. 237-251, 1991.
Preliminary version available as INRIA RR, No. 1144, 1989.
http://www.inria.fr/RRRT/RR-1144.html

[J51]    Z. Liu, “A Note on Graham’s Bound”, Information Processing Letters, Vol. 36, pp. 1-5, 1990.

[J52]    F. Baccelli, Z. Liu, “On the Executions of Parallel Programs on Multiprocessor Systems -- A Queueing Theory Approach”, Journal of the ACM, Vol. 37, No. 2, April 1990, pp. 373-414.
Preliminary version available as INRIA RR, No. 833, 1988.
http://www.inria.fr/RRRT/RR-833.html

[J53]    F. Baccelli, Z. Liu, “On the Stability Condition of a Precedence-Based Queueing Discipline”, Advances in Applied Probability, Vol. 21, pp. 883-898, 1989.
Preliminary version available as INRIA RR, No. 880, 1988.
http://www.inria.fr/RRRT/RR-880.html

[B1]    P. Chretienne, E. G. Coffman, J. K. Lenstra, Z. Liu, (Eds.) Scheduling Theory and Its Applications, J. Wiley, 1995.

[B2]    Z. Liu, N. Niclausse and C. Jalpa-Villanueva, “Web Server Benchmarking and Web Traffic Modeling”, In System Performance Evaluation: Methodologies and Applications, E. Gelenbe (Ed.), CRC Press, 1999.

[B3]    Z. Liu, “Majorization and Stochastic Comparison Techniques for Scheduling of Parallel Systems”, in Quantitative Methods in Parallel Systems, Baccelli et al. (Eds.), Springer, 1995, pp. 206-219.

[B4]    Z. Liu, E. Sanlaville, “Profile Scheduling by List Algorithms”, in Scheduling Theory and Its Applications, P. Chretienne et al. (Eds.), J. Wiley, 1995, pp. 95-114.

[B5]    L. Finta, Z. Liu, “Makespan Minimization of Task Graphs with Random Task Running Times”, in Interconnection Networks and Mapping and Scheduling Parallel Computations, D. F. Hsu et al. (Eds.), AMS, DIMACS Series in Discrete Mathematics and Theoretical Computer Science, Vol. 21, pp. 125-138, 1995.

[B6]    O.J. Boxma, G.M. Koole, Z. Liu, “Queueing-Theoretic Solution Methods for Models of Parallel and Distributed Systems”, in Performance Evaluation of Parallel and Distributed Systems -- Solution Methods, O.J. Boxma and G.M. Koole (Eds.), CWI Tract 105 & 106, pp. 1-24, CWI, Amsterdam, 1994.

[B7]    F. Baccelli, A. Jean-Marie, Z. Liu, “A Survey on Solution Methods for Task Graph Models”, in Second QMIPS Workshop, Götz, Herzog, Rettelbach (Eds.), Arbeitsberichte der IMMD, 26 , 14, Erlangen, March 1993.

[B8]    F. Baccelli, A. Jean-Marie, Z. Liu, “Using Stochastic Recursive Equations as a Tool for Modeling and Performance Evaluation of Parallel Processing Systems”, in Second QMIPS Workshop, Götz, Herzog, Rettelbach (Eds.), Arbeitsberichte der IMMD, 26 , 14, Erlangen, March 1993.

[C1]    N. Malouch, Z. Liu, “On Steady State Analysis of TCP in Networks with Differentiated Services”, Proceedings of the International Teletraffic Conference, Salvador da Bahia, Brazil, September 24-28, 2001.

[C2]    J. Talim, Z. Liu, P. Nain, E. G. Coffman, Jr., “Controlling Robots in Web Search Engines”, Proceedings of the Sigmetrics’2001, Boston, MA, June 2001.

[C3]    F. Baccelli, D. Hong, Z. Liu, “Fixed Point Methods for the Simulation of the Sharing of a Local Loop by a Large Number of Interacting TCP Connections”, Proceedings of the ITC Specialist Conference on Local Loop, Barcelona, Spain, April 2001.

[C4]    Z. Liu, N. Niclausse and C. Jalpa-Villanueva, “WAGON: A Web Server Benchmarking tool”, Poster Proceedings of the 8th World Wide Web Conference, Toronto, Canada, May 1999.

[C5]    J. Talim, Z. Liu, P. Nain, E. G. Coffman, Jr., “Optimizing the Number of Robots for Web Search Engines”, Proceedings of 7th International Conference on Telecommunication Systems, pp. 276-288, Nashville (TN), USA, March 1999.

[C6]    N. Niclausse, Z. Liu, P. Nain, “A New Efficient Caching Policy for the World Wide Web”, Proc. WISP, pp.119-128, Madison, Wisconsin, June 1998.

[C7]    Z. Liu, R. Righter, “Optimal Parallel Processing of Random Task Graphs”, Proc. 6-th International Workshop on Project Management and Scheduling, July 7-9, 1998, Istanbul, Turkey.

[C8]    Z. Liu, P. Nain, N. Niclausse, D. Towsley, “Static Caching of Web Servers”, Proc. Multimedia Computing and Networking, San Jose, California, USA, January 1998.

[C9]    Z. Liu, P. Nain, D. Towsley, “Bounds on Finite Horizon QoS Metrics with Application to Call Admission” Proc. INFOCOM 96, San Francisco, USA, April 1996. INRIA RR, No. 2735, 1995.

[C10]    G. Koole, Z. Liu, “Nonconservative Service for Minimizing Cell Loss in ATM Networks” Proc. of First Workshop on ATM Traffic Management IFIP, WG.6.2, Paris, Dec. 1995.

[C11]    Z. Liu, P. Nain, D. Towsley, “Bounds on the Tail Distributions of Markov-Modulated Stochastic Max-Plus Systems”, Proc. CDC, New Orleans, USA, Dec. 1995.

[C12]    G. Koole, Z. Liu, “On the Control of Tandems of Queues with Finite Buffers”, Proc. of Allerton Conference, Allerton, USA, Oct. 1995.

[C13]    Z. Liu, “Performance Bounds for Stochastic Timed Petri Nets”, In Proc. of 16-th Internation Conference on Applications and Theory of Petri Nets, Torino (Italy) 1995. Lecture Notes in Computer Science, Vol. 935, G. De Michelis and M. Diaz (Eds.), pp. 316-334, 1995.

[C14]    Z. Liu, “Scheduling of Random Task Graphs on Parallel Processors”, Proc. of Modeling, Analysis, and Simulation of Computer and Telecommunication Systems January 1995, Durham (North Carolina), USA. Eds: P. Dowd and E. Gelenbe, IEEE Computer Society Press.

[C15]    Z. Liu, P. Nain, D. Towsley, “Exponential Bounds for a Class of Stochastic Processes with Application to Call Admission Control in Networks”, Proc. CDC, 1994.

[C16]    L. Finta, Z. Liu, “Stochastic Scheduling of Precedence Graphs”, Proc. 11-th International Conf. on Analysis and Optimization of Systems, Sophia-Antipolis, June 1994.

[C17]    L. Finta, Z. Liu, “Scheduling of Parallel Programs in Single-Bus Multiprocessor Systems”, In : Fourth QMIPS Workshop, P.G. Harrison and A.C. de Pinto (eds.), Research Report Document 94/18, pp. 1-27, Department of Computing, Imperial College, April 1994.

[C18]    C. Coroyer, Z. Liu, “Effectiveness of Heuristics and Simulated Annealing for the Scheduling of Concurrent Tasks -- An Empirical Comparison,” Proc. 5-th International Conference on Parallel Architectures and Languages Europe (Eds. A. Bode, M. Reeve, G. Wolf), Munich, Germany, June 1993, Springer, pp. 452-463.

[C19]    E. Altman, Z. Liu, “Improving the Stability Characteristics of Asynchronous Traffic in FDDI Token Ring”, Proc. of the Fifth International Conference on Data Communication Systems and Their Performance, Raleigh, October 1993. H. G. Perros, Y. Viniotis (Eds.), North Holand, pp. 441-460.

[C20]    Z. Liu, D. Towsley, “Burst Reduction Properties of the Token Bank in ATM Networks”, Modeling and Performance Evaluation of ATM Technology, IFIP Workshop TC6, La Martinique, French Carribean Island, Jan. 1993.

[C21]    Z. Liu, E. Sanlaville, “Stochastically Minimizing the Makespan of Structured Jobs”, Proc. of the Summer School on Scheduling Theory and Its Applications, Bonas (Gers), France, Sept. 1992, pp. 166-184.

[C22]    Z. Liu, E. Sanlaville, “Scheduling in Multiprocessor Systems with Random Execution Time, Precedence Constraints and Variable Profile”, Proc. of Symposium of Applied Mathematics of Academia Sinica, Beijing, P. R. China, July 1992.

[C23]    Z. Liu, P. Nain, “Optimal Scheduling in Some Multi-Queue Single-Server Systems”, Proc. of INFOCOM 90, California, U.S.A., June 1990.

[C24]    Z. Liu, P. Mussi, “Deadlock Free Routing on a Ring--A Performance Evaluation”, Pittsburgh Conference on Simulation and Modelling, May 1990.

[C25]    Z. Liu, “Optimal Routing in the De Bruijn Networks”, Tenth International Conference on Distributed Computing Systems, May 1990, Paris, France, pp. 537-544.

[C26]    F. Baccelli, Z. Liu, D. Towsley, “Optimal Scheduling of Parallel Processing Systems with and without Real-Time Constraints”, Proc. of the 27th International Allerton Conference, Illinois, U.S.A., September 1989.

[C27]    F. Baccelli, Z. Liu, “Maximum Throughput of Parallel Executions”, Fourth International Symposium on Computer and Information Sciences, pp. 267-276, Cesme, Turkey, October 1989.

[C28]    F. Baccelli, Z. Liu, “On the Stability Condition of a Precedence-Based Queueing Discipline”, Proc. of the 26th International Allerton Conference, Illinois, U.S.A., September 1988.

[C29]    E. Gelenbe, Z. Liu, “Performance Analysis Approximations for Parallel Processing in Multiprocessor Systems”, North-Holland, Eds. Cosnard et al., Proc. of IFIP Working Conference on Parallel Processing, pp.363-375, Pise, Italy, April, 1988.

[C30]    Z. Liu, J. Labetoulle, “A Heuristic Method for Loading and Scheduling Flexible Manufacturing Systems”, Proc. of Control 88, London, UK, IEE Conference Publication No.285, pp.195-200, 1988.