Tsvyatkov, Petar, Emil Yankov, Lyubomir Lazov, Edmunds Teirumnieks, and Erika Teirumnieka. “COLOR MARKING OF STAINLESS STEEL AND TITANIUM WITH THE LASER OXIDATION METHOD”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (January 16, 2024): 363–369. Accessed May 18, 2024. https://journals.ru.lv/index.php/ETR/article/view/7318.