Paegle, L. et al. 2021. NUMBER OF FINE PARTICLES’ AND THEIR MASS CONCENTRATION: COMPARISON OF EMISSION OF NEW PRINTING TECHNOLOGY VERSUS TRADITIONAL LASER TECHNOLOGY. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference. 1, (Jun. 2021), 200–205. DOI:https://doi.org/10.17770/etr2021vol1.6558.