“THE FORMAL-ANALYTICAL DESCRIPTION OF WOOD FOR THE PURPOSES OF THE CLASSIFICATION OF WOOD SPECIES. PART 2. WOOD FORMULAS”. Innovation in Woodworking Industry and Engineering design 9, no. 2 (January 30, 2026). Accessed February 25, 2026. http://innojs.ltu.bg/index.php/scjournal-inno/article/view/257.