MARTINOV, N. A solution to a problem of Fedorov-Grünbaum. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 87, p. 73–85, 1995. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/406. Acesso em: 22 nov. 2024.