Abro, A. A., A. B. Abro, M. Abro, and A. A. Siddique. “Model Valuation of MPLS Utilization Physical and Virtual Network on GNS3”. University of Sindh Journal of Information and Communication Technology , Vol. 2, no. 2, Apr. 2018, pp. 94-99, https://sujo.usindh.edu.pk/index.php/USJICT/article/view/515.