LAZOV, Lyubomir; PADAREV, Nikolay; YOVCHEV, Milko; LINKOV, Lyubomir. THE CHANGE OF CONTRAST IS INVESTIGATION OF 75 STEEL SAMPLES LASER MARKED WITH DIFFERENT MODES. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 3, p. 334–338, 2024. DOI: 10.17770/etr2023vol3.7264. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/7264.. Acesso em: 22 dec. 2024.