PÁLFALVI, Attila. Methods for solving a semi-differential vibration equation. Periodica Polytechnica Mechanical Engineering, [S. l.], v. 51, n. 2, p. 77–81, 2007. 10.3311/pp.me.2007-2.06. Disponível em: https://pp.bme.hu/me/article/view/1320. Acesso em: 3 may. 2024.