ŚLOSARSKI, M. The multi-morphisms and their properties and applications. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 14, p. 5–25, 2015. Disponível em: https://studmath.uken.krakow.pl/article/view/13150. Acesso em: 31 oct. 2026.