Wójcik, Jan, Pawel Mergo, Jacek Klimek, Grzegorz Wójcik, Krzysztof Skorupski, Janusz Pędzisz, and Jarosław Kopeć. “Technology of High Birefringent Microstructured Polymer Optical Fibers”. Photonics Letters of Poland 2, no. 1 (March 30, 2010): pp. 4–6. Accessed February 24, 2024. https://photonics.pl/PLP/index.php/letters/article/view/2-2.