NAIR, P. C. P.; BABY, T. A. 2-domination polynomials of graphs. International journal of health sciences, [S. l.], v. 6, n. S6, p. 875–882, 2022. DOI: 10.53730/ijhs.v6nS6.9708. Disponível em: https://sciencescholar.us/journal/index.php/ijhs/article/view/9708. Acesso em: 20 jan. 2026.