NAZMUL, S. On type-2 m-topological spaces. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 16, p. 77–93, 2018. Disponível em: https://studmath.uken.krakow.pl/article/view/12974. Acesso em: 21 jul. 2026.