MUSAEV, D. K. Tubular (weakly) Π-complete and (weakly) Π-completeness of continuous mappings, their properties and characterizations by the use of morphisms. Methods of Functional Analysis and Topology, [S. l.], v. 9, n. 3, p. 241–246, 2003. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/218. Acesso em: 19 dec. 2025.