RAJAN, M. A.; KEMBHAVIMATH, N. M.; LOKESHA, V. On Study of Vertex Labeling of Graph Operations. Journal of Scientific Research, [S. l.], v. 3, n. 2, p. 291–301, 2011. DOI: 10.3329/jsr.v3i2.6222. Disponível em: https://banglajol.info/index.php/JSR/article/view/6222. Acesso em: 25 may. 2022.