TUKHTASINOV, M. On Starting Control of Vibrations of a String. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 2, p. 228–238, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3746. Acesso em: 27 apr. 2025.