“Performance Evaluation of Post and Symmetrical DCF Technique with EDFA in 32x10, 32x20 and 32x40 Gbps WDM Systems”, Int. J. Curr. Eng. Technol., vol. 8, no. 4, pp. 1416–1420, Aug. 2017, Accessed: Mar. 13, 2026. [Online]. Available: https://ijcet.evegenis.org/index.php/ijcet/article/view/2383