On the defining spectrum of kk-regular graphs with k–1k–1 colors. Journal of Prime Research in Mathematics, [S. l.], v. 1, n. 1, p. 118 – 135, 2005. Disponível em: https://jprm.sms.edu.pk/index.php/jprm/article/view/4. Acesso em: 4 feb. 2026.