“INFLUENCE OF COMPONENTS (UV + VIS) OF SOLAR RADIATION ON THE COLOR CHANGE OF UNSTEAMED AND STEAMED BEECH WOOD”, INNO, vol. 11, no. 2, Jan. 2026, Accessed: Feb. 25, 2026. [Online]. Available: http://innojs.ltu.bg/index.php/scjournal-inno/article/view/287