Christopher Ogwugwuam Ezeagwu. “Improving Fibre Optics Transmission With Wave Length Division Multiplex through Routed-Switching Network”. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006 6, no. 8 (August 25, 2020): 50-55. Accessed September 16, 2021. https://ijasre.net/index.php/ijasre/article/view/1056.