Naji Al-Azzawi, Y.O. (2018) “Semi-Active Damping of Mechanical Vibrating Systems Using Variable Stiffness Actuator”, Al-Khwarizmi Engineering Journal, 4(2), pp. 76–82. Available at: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/544 (Accessed: 16 December 2025).