Тлеукенов, С, К Балабеков, and З Жалгасбекова. “Group Velocity and Flow of Electromagnetic Energy in Rhombic Crystals”. BULLETIN OF THE L.N. GUMILYOV EURASIAN NATIONAL UNIVERSITY. PHYSICS. ASTRONOMY SERIES 126, no. 1 (July 4, 2022): 90–107. Accessed December 4, 2024. https://bulphysast.enu.kz/index.php/physast/article/view/148.