RAJASINGH, I.; PUSHPAM, P. R. L. Equality of graphoidal and acyclic graphoidal covering number of a graph. Tamkang Journal of Mathematics, [S. l.], v. 37, n. 2, p. 175–183, 2006. DOI: 10.5556/j.tkjm.37.2006.162. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/162. Acesso em: 29 apr. 2024.