ABO ELHAMAY, M. A. Near approximations via general ordered topological spaces. JOURNAL OF ADVANCES IN MATHEMATICS, [S. l.], v. 10, n. 4, p. 3415–3424, 2015. DOI: 10.24297/jam.v10i4.1240. Disponível em: https://rajpub.com/index.php/jam/article/view/1240. Acesso em: 22 nov. 2024.