Trapezon, Kirill, and Alexandr Trapezon. “A Technique for Applying the Symmetry Method to Solve a Problem of Torsional Vibrations of Disks of Variable Thickness”. Eastern-European Journal of Enterprise Technologies 2, no. 7 (134) (April 29, 2025): 6–14. Accessed December 27, 2025. https://journals.uran.ua/eejet/article/view/323561.