YAQOOB, Naveed; CRISTEA, Irina; GULISTAN, Muhammad; NAWAZ, Shah. LEFT ALMOST POLYGROUPS: left almost polygroups. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 39, p. 465–474, 2018. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6900. Acesso em: 26 sep. 2026.