MECHANICAL PROPERTIES OF THREE-LAYERED PARTICLEBOARDS WITH FACE LAYERS OF BEECH AND OAK PARTICLES AND A CORE LAYER OF CONIFER AND SUNFLOWER STALKS PARTICLES. INNO [Internet]. 2026 Feb. 4 [cited 2026 Feb. 25];12(2). Available from: http://innojs.ltu.bg/index.php/scjournal-inno/article/view/369