Gochev, Zhivko, and Pavlin Vitchev. “THE EFFECT OF THE FOCAL LENGTH POSITION OF THE FOCUSING LENS ON THE DISCOLORATION ROUGHNESS OF PLYWOOD UNDER DIFFERENT CO2 LASER ENGRAVING MODES”. Acta Facultatis Xylologiae Zvolen 66, no. 2 (December 11, 2024): 75–88. Accessed April 26, 2025. https://ojs.tuzvo.sk/index.php/AFXZ/article/view/116.