Tarasenko-Zelenaya , L. I., A. N. Zavarin, and S. L. Radvansky. “High-Frequency Kernel in the Algorithm of Function Restoration from the Projections for Diverging Beams”. Ukrains’kyi Matematychnyi Zhurnal 40, no. 2 (February 29, 1988): 253–256. Accessed February 17, 2026. https://umj.imath.kiev.ua/index.php/umj/article/view/9128.