Lazur, V. Yu., M I. Gaisak, and Yu. L. Mentkovsky. “To the 80-Th Anniversary of Professor V.I. Lengyel’s Birthday (1934–2000)”. Ukrainian Journal of Physics 59, no. 5 (October 23, 2018): 555. Accessed April 19, 2024. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018482.