Karasiński, Paweł, and Ewa Gondek. “1-D Photonic Crystals for Photovoltaics”. Photonics Letters of Poland 4, no. 2 (June 27, 2012): pp. 75–77. Accessed May 1, 2024. http://photonics.pl/PLP/index.php/letters/article/view/4-27.