AzizovM., and PereverzevS. V. “Optimal Methods for Specifying Information in the Solution of Integral Equations With Analytic Kernels”. Ukrains’kyi Matematychnyi Zhurnal 48, no. 5 (May 25, 1996): 656-664. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5299.