Ilchyshyn, I. P., and E. A. Tikhonov. “How Laser Physics Brought Optics to the World of Photonic Crystals”. Ukrainian Journal of Physics 65, no. 4 (April 17, 2020): 327. Accessed April 18, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019676.