NAIDENOVA, M.; MILEV, N.; KOSTADINOV, G. A classification of the uniform coverings. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 99, p. 121–127, 2009. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/116. Acesso em: 22 nov. 2024.