KHADZHIIVANOV, N.; ŠCHEPIN, E. Cohomologies of countable unions of closed sets with applications to Cantor manifolds. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 87, p. 249–255, 1995. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/418. Acesso em: 23 nov. 2024.