SZILÁGYI, B. ON SOME PROBLEMS OF THE EQUILIBRIUM CONDITIONS OF THE FEEDBACK SYSTEMS OF SECOND ORDER Periodica Polytechnica Electrical Engineering, [S. l.], v. 20, n. 3, p. 263–279, 1976. Disponível em: https://pp.bme.hu/ee/article/view/4921. Acesso em: 17 may. 2024.