“NUMERICAL INVESTIGATIONS OF THE NATURAL FREQUENCIES AND MODE SHAPES OF THE TORSIONAL VIBRATIONS IN THE SAW UNIT OF A KIND OF WOOD SHAPERS, USED IN THE WOOD PRODUCTION”. Innovation in Woodworking Industry and Engineering Design, vol. 2, no. 2, Jan. 2026, http://innojs.ltu.bg/index.php/scjournal-inno/article/view/101.