This web page lists the references in my paper:

"Covering Regions with Rectangles" with Seth Chaiken, Daniel J. Kleitman and Michael Saks, SIAM J. Alg. and Disc. Meth., 2(1981), p. 394-410.

- C. Berge, "Perfect Graphs", in Studies in Graph Theory Part I, D. R. Fulkerson, ed., Studies in Mathematics 11, Mathematical Association of America, 1975, pp. 1-22.
- R. Brualdi, "Tranversal theory and graphs", in Studies in Graph Theory, Part I, D. R. Fulkerson, ed., Studies in Mathematics 11, Mathematical Association of America, 1975, pp. 23-88.
- F. R. K. Chung, personal communication, February, 1979.
- C. C. Liu, Introduction to Combinatorial Mathematics, McGraw-Hill, New York, 1968.
- W. Masek, personal communication, June, 1979.
- D. R. Woodall, "Minimax theorems in graph theory", in Selected Topics in Graph Theory, L. W. Beineke and R. J. Wilson, eds., Academic Press, New York, 1978, pp. 237-269.

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