SWEETLY, R.; JOSEPH, J. P. Some Special $V_4$-magic Graphs. Journal of Informatics and Mathematical Sciences, [S. l.], v. 2, n. 2 & 3, p. 141–148, 2010. DOI: 10.26713/jims.v2i2 & 3.33. Disponível em: http://rgnpublications.com/journals/index.php/jims/article/view/33. Acesso em: 2 may. 2024.