HEIDARI, D.; DAVVAZ, B. Characterization of Polygroups by IP-Subsets. Eurasian Mathematical Journal, [S. l.], v. 11, n. 3, p. 35–41, 2020. DOI: 10.32523/2077-9879-2020-11-3-35-41. Disponível em: https://emj.enu.kz/index.php/main/article/view/186. Acesso em: 30 sep. 2026.