Dolchinkov, Nikolay Todorov, Lyubomir Lazov, Jordan Shterev Ivanov, Deyan Dimitrov Nedyalkov, and Lyubomir Ivanov Linkov. “STUDY OF CUTTING AND LABELING OF POLYMETHYLMETHACRYLATE USING A CO2 LASER”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 20, 2019): 37–40. Accessed May 7, 2024. https://journals.ru.lv/index.php/ETR/article/view/4203.