SUKRETNA, A. V. Bounded approximate synthesis of the optimal control for the wave equation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 8, p. 1094–1104, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3372. Acesso em: 6 dec. 2025.