ASSANOVA, A. T. On a Nonlocal Boundary-Value Problem for Systems of Impulsive Hyperbolic Equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 65, n. 3, p. 315–328, 2013. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2421. Acesso em: 5 dec. 2025.