KOK, Johan; BEJ, Saptarshi. Coloring sums of extensions of certain graphs. Journal of Algebra Combinatorics Discrete Structures and Applications, [S. l.], v. 5, n. 1, p. 19–27, 2018. Disponível em: https://www.jacodesmath.com/index.php/jacodesmath/article/view/80. Acesso em: 20 oct. 2026.