SAHAMI, A. Counter examples for pseudo-amenability of some semigroup algebras. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 19, p. 35–38, 2020. Disponível em: https://studmath.uken.krakow.pl/article/view/7325. Acesso em: 7 may. 2024.