BABU, D. Reddy; VARMA, P.L.N. VERTEX-TO-EDGE CENTERS W.R.T. D-DISTANCE. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 35, p. 101–108, 2015. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6451. Acesso em: 16 aug. 2026.