HOFFMANN, A. USE OF THE SUMMABLE SERIES (C,1) IN RESEARCH OF BAR VIBRATIONS. Periodica Polytechnica Mechanical Engineering, [S. l.], v. 20, n. 4, p. 289–294, 1976. Disponível em: https://pp.bme.hu/me/article/view/5956. Acesso em: 3 jul. 2024.