Covering a Square by Small Perimeter Rectangles. N. Alon; D.J. Kleitman — 1986 Discrete & computational geometry
Diameter and Radius in the Manhattan Metric. D.J. Kleitman; D.Z. Du — 1990 Discrete & computational geometry
A purely combinatorial proof of the Hadwiger Debrunner ( p , q ) conjecture. Alon, N.; Kleitman, D.J. — 1997 The Electronic Journal of Combinatorics [electronic only]