ON RADIO $k$-CHROMATIC NUMBER OF A HELM GRAPH. Advances and Applications in Discrete Mathematics, [S. l.], v. 42, n. 1, p. 79–88, 2024. DOI: 10.17654/0974165825006. Disponível em: https://pphmjopenaccess.com/aadm/article/view/2445. Acesso em: 5 jan. 2026.