Poletaev, G. S. “Reconstruction of a Pair Integral Operator of the Convolution Type”. Ukrains’kyi Matematychnyi Zhurnal 54, no. 8 (August 25, 2002): 1077-1088. Accessed May 9, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4148.