Petchenko, G. O., and O. M. Petchenko. “Research of the Elastic Wave Velocity Dispersion in X-Ray-Irradiated LiF Crystals”. Ukrainian Journal of Physics 58, no. 10 (October 11, 2018): 974. Accessed April 25, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018376.