Faedo - Galerkin method of nonlinear second order evolution equations with Volterra-type operators. Neliniini Kolyvannya, [S. l.], v. 10, n. 2, p. 204–228, 2007. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/431. Acesso em: 22 jan. 2026.