CSÁKI, Frigyes. GEGENWÄRTIGE HAUPTTENDENZEN IN DER NICHTLINEAREN REGELUNGSTHEORIE Periodica Polytechnica Electrical Engineering, [S. l.], v. 9, n. 1, p. 1–13, 1965. Disponível em: https://pp.bme.hu/ee/article/view/5231. Acesso em: 17 may. 2024.