N. T. Dolchinkov, L. Lazov, J. S. Ivanov, D. D. Nedyalkov, and L. I. Linkov, “STUDY OF CUTTING AND LABELING OF POLYMETHYLMETHACRYLATE USING A CO2 LASER”, ETR, vol. 3, pp. 37–40, Jun. 2019, doi: 10.17770/etr2019vol3.4203.