Perlicki, Krzysztof. “Impact of Alien Wavelength on Wavelength Division Multiplexing Transmission Quality”. Photonics Letters of Poland 4, no. 3 (September 28, 2012): pp. 118–120. Accessed April 3, 2025. http://m.photonics.pl/PLP/index.php/letters/article/view/4-42.