JANEVA, Biljana. CONGRUENCES ON \((n,m)\)-GROUPS. Matematichki Bilten, [S. l.], v. 23, n. 1, p. 19–24, 1999. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1593. Acesso em: 14 aug. 2026.