ZHANG, Li; ZHAN, Jianming. A STUDY ON BIJECTIVE SOFT HEMIRINGS. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 39, p. 485–497, 2018. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6893. Acesso em: 26 sep. 2026.