INSPERGER, Tamás; HORVÁTH, Roland. PENDULUM WITH HARMONIC VARIATION OF THE SUSPENSION POINT. Periodica Polytechnica Mechanical Engineering, [S. l.], v. 44, n. 1, p. 39–46, 2000. Disponível em: https://pp.bme.hu/me/article/view/1427. Acesso em: 2 may. 2024.