Solodkii, S. G. “Optimization of Algorithms for the Approximate Solution of the Volterra Equations With Infinitely Differentiable Kernels”. Ukrains’kyi Matematychnyi Zhurnal 46, no. 11 (November 25, 1994): 1534–1545. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/5592.