KOPACHEVSKII, N. D.; SEMKINA, E. V. Complete Volterra Integrodifferential Equations of the Second Order Unsolved with Respect to the Higher Derivative. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 66, n. 11, p. 1485–1497, 2014. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2240. Acesso em: 27 apr. 2025.