P. F. Zhuk and . A. A. Musina, “Asymptotic Rate of Convergence of a Two-Layer Iterative Method of the Variational Type”, Ukr. Mat. Zhurn., vol. 65, no. 12, pp. 1622–1635, Dec. 2013, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2541