Lazov, Lyubomir, Pēteris Čeirs, and Imants Adijans. 2021. “ON THE POSSIBILITY OF MARKING EGGS WITH A CO2 LASER”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June): 168-72. https://doi.org/10.17770/etr2021vol3.6625.