Gоlоvach К. P.; Кalaіda A. F. Application of the quadrature iteration method of finding eigenvalues and eigenfunctions of an integral operator. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 23, n. 3, p. 367–372, 1971. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8564. Acesso em: 5 dec. 2025.