GŁADKI, Paweł. Orderings of higher level in multifields and multirings. Annales Mathematicae Silesianae, [S. l.], v. 24, p. 15–25, 2010. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/14031. Acesso em: 26 apr. 2025.