M. Askarov, “On the rate of convergence of methods of projection-iterative type for Fredholm equations with periodic analytic kernels”, Ukr. Mat. Zhurn., vol. 47, no. 9, pp. 1155–1161, Sep. 1995, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5514