MICHELBERGER, Pál; NÁDAI, László; VÁRLAKI, Péter; JOÓ, István. Riesz Bases in Control Theory. Periodica Polytechnica Transportation Engineering, [S. l.], v. 30, n. 1-2, p. 21–36, 2002. Disponível em: https://pp.bme.hu/tr/article/view/1942. Acesso em: 3 may. 2024.