Asanov, A., and T. Bekeshov. “On a Class of Nonclassical Linear Volterra Integral Equations of the First Kind”. Ukrains’kyi Matematychnyi Zhurnal 72, no. 2 (February 15, 2020): 161-172. Accessed April 2, 2020. http://umj.imath.kiev.ua/index.php/umj/article/view/740.