MAHMOOD, Sabiha I . On A Bitopological (1,2)*- Proper Functions. Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 26, n. 2, p. 358–373, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/483.. Acesso em: 24 nov. 2024.