KARSAI , Géza. STABILITY OF PERIODICALLY OPERATING DYNAMIC SYSTEIVIS Periodica Polytechnica Mechanical Engineering, [S. l.], v. 40, n. 1, p. 45–57, 1996. Disponível em: https://www.pp.bme.hu/me/article/view/5483. Acesso em: 22 may. 2025.