Grigorov, Rosen, and Viktor Savov. “MECHANICAL PROPERTIES OF THREE-LAYERED PARTICLEBOARDS WITH FACE LAYERS OF BEECH AND OAK PARTICLES AND A CORE LAYER OF CONIFER AND SUNFLOWER STALKS PARTICLES”. 2026. Innovation in Woodworking Industry and Engineering Design, vol. 12, no. 2, Feb. 2026, https://doi.org/10.66211/inno.2023.2.369.