Khorolets, L. S., and Y. P. Machekhin. 2016. “Photonic Crystals With Defects, As a Storage Location for Cooling Atoms and Ions”. Journal of V. N. Karazin Kharkiv National University. Series Physics, no. 23 (December), 57-61. https://periodicals.karazin.ua/physics/article/view/7776.