PETRIK, O. KRÄFTE (MOMENT)-RÜCKKOPPELUNGSSYSTEM VON MECHATRONISCHEN ELEMENTEN. Periodica Polytechnica Mechanical Engineering, [S. l.], v. 31, n. 2-3, p. 175–179, 1987. Disponível em: https://pp.bme.hu/me/article/view/5698. Acesso em: 30 may. 2025.