PORUBSKÝ, Štefan. Sets of regular systems of divisors of a generalized integer. Annales Mathematicae Silesianae, [S. l.], v. 12, p. 149–156, 1998. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/14175. Acesso em: 5 dec. 2025.