SemenovaE. V., and SolodkiiS. G. 2018. “Approximate and Information Aspects of the Numerical solution of Unstable Integral and Pseudodifferential Equations”. Ukrains’kyi Matematychnyi Zhurnal 70 (3), 429-44. http://umj.imath.kiev.ua/index.php/umj/article/view/1566.