VIRCHENKO, Y. P.; TOLMACHEVA, Y. A. Revision of upper estimate of percolation threshold on square lattice. Математическая физика, анализ, геометрия, Харків, Україна, v. 10, n. 1, p. 29–39, 2003. Disponível em: https://mag.ilt.kharkiv.ua/index.php/mag/article/view/m10-0029e. Acesso em: 21 лис. 2024.