On $\psi$ gs-Functions in Bitopological Spaces. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 17, n. 3, p. 2173–2181, 2024. DOI: 10.29020/nybg.ejpam.v17i3.5208. Disponível em: https://ejpam.com/index.php/ejpam/article/view/5208. Acesso em: 27 sep. 2024.