Malyshev К. I. Direct methods for the approximate solution of systems of singular integral equations in the case of nonnegative partial indices. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 12, p. 1638–1644, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4768. Acesso em: 6 dec. 2025.