VALOV, V. Surjective characterizations of metrizable $LC^{\infty}$-spaces. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 85, p. 43–47, 1993. Disponível em: https://ftl5.uni-sofia.bg/index.php/fmi/article/view/452. Acesso em: 5 dec. 2024.