Aliiev, Igramotdin, and Oleg Markov. “Sokolov Lev Nikolaevich (for 100th Anniversary)”. Materials working by pressure, no. 1(51) (November 11, 2022): 3–9. Accessed August 27, 2025. http://omd.dgma.donetsk.ua/index.php/main/article/view/182.