Projection-algebraic approximation of linear and nonlinear differential-operator equations in Banach spaces. Neliniini Kolyvannya, [S. l.], v. 12, n. 4, p. 495–506, 2009. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/540. Acesso em: 21 jan. 2026.