KOSTYSHYN, L. P.; SHUVAR, B. A. Aggregate-Iterative Methods for the Approximation of Solutions of Boundary-Value Problems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 10, p. 1425–1431, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4011. Acesso em: 14 apr. 2025.