TAHMASEBI, Nazanin. Inner amenable hypergroups, invariant projections and Hahn-Banach extension theorem related to hypergroups. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 61, n. 2, p. 195–220, 2016. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5553. Acesso em: 5 feb. 2025.