L. Collatz The 93 classes of equatilings of the plane with characteristics >=3. [Citation Graph (0, 0)][DBLP] Discrete Mathematics, 1992, v:102, n:1, pp:1-11 [Journal]

G. M. Hamilton, D. G. Rogers Further results on irregular, critical perfect systems of difference sets I: split systems. [Citation Graph (0, 0)][DBLP] Discrete Mathematics, 1992, v:102, n:1, pp:25-45 [Journal]

Doron Zeilberger A proof of Julian West's conjecture that the number of two-stacksortable permutations of length n is 2(3n)!/((n + 1)!(2n + 1)!). [Citation Graph (0, 0)][DBLP] Discrete Mathematics, 1992, v:102, n:1, pp:85-93 [Journal]

Oleg V. Borodin, Jean Mayer Decomposition of K_{13} into a torus graph and a graph imbedded in the Klein bottle. [Citation Graph (0, 0)][DBLP] Discrete Mathematics, 1992, v:102, n:1, pp:97-98 [Journal]