CHRONOWSKI, A. Ternary semigroups of linear mappings and matrices. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 1, p. 5–17, 2001. Disponível em: https://studmath.uken.krakow.pl/article/view/13512. Acesso em: 30 oct. 2026.