KATCHALSKI, Meir. A conjecture of Grünbaum on common transversals. MATHEMATICA SCANDINAVICA, [S. l.], v. 59, p. 192–198, 1986. DOI: 10.7146/math.scand.a-12161. Disponível em: https://tidsskrift.dk/math/article/view/12161. Acesso em: 14 aug. 2026.