KATCHALSKI, M. 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://www.mscand.dk/article/view/12161. Acesso em: 2 may. 2024.