TABATABAIE, S. M.; SALEC, A. R. B.; ALLAMI, H. R. J. Porosity in the context of hypergroups. Eurasian Mathematical Journal, [S. l.], v. 15, n. 1, p. 75–90, 2024. DOI: 10.32523/2077-9879-2024-15-1-75-90. Disponível em: https://emj.enu.kz/index.php/main/article/view/14. Acesso em: 25 oct. 2026.