Vu Xuan Truong, Tran The Van, and Nguyen Quoc Manh. “ON A RESEARCH TORSIONAL VIBRATIONS IN DAMPED SHAFT SYSTEMS WITH MULTIPLE DEGREES OF FREEDOM”. UTEHY Journal of Applied Science and Technology, Vol. 39, Sept. 2023, pp. 15-21, http://tapchi.utehy.edu.vn/index.php/jst/article/view/627.