KOULAKZIAN, M. S.; NIKOGHOSYAN, Z. G. Two Generalized Lower Bounds for the Circumference. Mathematical Problems of Computer Science, [S. l.], v. 49, p. 18–25, 2021. DOI: 10.51408/1963-0002. Disponível em: http://mpcs.sci.am/index.php/mpcs/article/view/78. Acesso em: 6 may. 2024.