ALI HADI, I. M.; AL-AEASHI, S. N. Y-coretractable and Strongly Y-coretractable Modules. Asian Journal of Applied Sciences, [S. l.], v. 5, n. 2, 2017. Disponível em: https://ajouronline.com/index.php/AJAS/article/view/4691. Acesso em: 20 jan. 2022.