V. RAMACHANDRAN; C. SEKAR. One modulo \(N\) gracefulness of H-class of graphs. Scientia, [S. l.], v. 26, p. 63–76, 2025. DOI: 10.71712/. Disponível em: https://revistas.usm.cl/scientia/article/view/228. Acesso em: 13 jun. 2026.