P. Tsvyatkov, E. Yankov, L. Lazov, E. Teirumnieks, and K. Pīgožnis, “INVESTIGATION OF THE INFLUENCE OF TECHNOLOGICAL PARAMETERS OF LASER MARKING ON THE DEGREE OF CONTRAST”, ETR, vol. 3, pp. 370–374, Jan. 2024, doi: 10.17770/etr2023vol3.7319.