Semkiv, Oleg, Olga Shoman, Elena Sukharkova, Alla Zhurilo, and Hanna Fedchenko. “Development of Projection Technique for Determining the Non-Chaotic Oscillation Trajectories in the Conservative Pendulum Systems”. Eastern-European Journal of Enterprise Technologies 2, no. 4 (86) (April 24, 2017): 48–57. Accessed April 28, 2024. https://journals.uran.ua/eejet/article/view/95764.