Roka, Rastislav, and Pavol Šalík. “Impact of Environmental Influences on Multilevel Modulation Formats at the Signal Transmission in the Optical Transmission Medium”. International Journal of Communication Networks and Information Security (IJCNIS) 9, no. 1 (April 17, 2022). Accessed April 29, 2024. https://ijcnis.org/index.php/ijcnis/article/view/2134.