SamoilenkoA. M. “Singular Integral Equation Equivalent in the Space of Smooth functions to an Ordinary Differential Equation, Method of Successive approximations for the Construction of Its Smooth Solutions and Its Nonsmooth Solutions”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 71, no. 4, Apr. 2019, pp. 543-6, http://umj.imath.kiev.ua/index.php/umj/article/view/1456.