“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”, INNO, vol. 2, no. 2, Jan. 2026, Accessed: Feb. 25, 2026. [Online]. Available: http://innojs.ltu.bg/index.php/scjournal-inno/article/view/101