KhachatryanA. Kh., and KhachatryanKh. A. “On Some Systems of Convolution-Type First-Order Integrodifferential Equations on the Semiaxis”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 9 (September 25, 2009): 1277-1292. Accessed November 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3099.