WALENDZIAK, A. Strong ideals and horizontal ideals in pseudo-BCH-algebras. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 15, p. 15–25, 2016. Disponível em: https://studmath.uken.krakow.pl/article/view/13139. Acesso em: 31 oct. 2026.