YOUSIF, Y Y; HUSSAIN, L A. Fibrewise Pairwise bi-Separation Axioms. Al-Nahrain Journal of Science, [S. l.], n. 1, p. 157–165, 2018. Disponível em: https://mail.anjs.edu.iq/index.php/anjs/article/view/2028. Acesso em: 22 may. 2026.