GadionenkoA. Y. (1966) “Resonance vibrations and rotations of a pendulum with a vibrating point of suspension”, Ukrains’kyi Matematychnyi Zhurnal, 18(2), pp. 102-106. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/8721 (Accessed: 28November2024).