Jóźwicki, Mateusz Łukasz, Mateusz Gargol, Małgorzata Gil-Kowalczyk, and Paweł Mergo. “Commercially Available Granulates PMMA and PS - Potential Problems With the Production of Polymer Optical Fibers”. Photonics Letters of Poland 12, no. 3 (September 30, 2020): 79–81. Accessed February 24, 2024. https://www.photonics.pl/PLP/index.php/letters/article/view/12-27.