KUZ, A. M.; PTASHNIK, B. I. Problem with integral conditions in the time variable for Sobolevtype system of equations with constant coefficients. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 4, p. 530–549, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1714. Acesso em: 5 dec. 2025.