RANGARAJAN, R.; REDDY, P. Siva Kota; SONER, N.D. \(m^{th}\) Power symmetric n-sigraphs. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 29, p. 87–92, 2012. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6057. Acesso em: 18 jul. 2026.