UrumbaevA. N. (1993) “On the optimization of direct methods for solving fredholm integral equations of the second kind with infinitely smooth kernels”, Ukrains’kyi Matematychnyi Zhurnal, 45(12), pp. 1695–1701. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5978 (Accessed: 24November2024).