Vorkalis, Arturs, and Luybomir Lazov. “LASER HARDENING PROCESS ON Ck 45 DEPENDING ON THE LASER PARAMETERS - a Small Review”. HUMAN. ENVIRONMENT. TECHNOLOGIES. Proceedings of the Students International Scientific and Practical Conference, no. 26 (January 9, 2023): 77–81. Accessed May 5, 2024. https://journals.rta.lv/index.php/HET/article/view/6960.