KhachatryanA. Kh., and KhachatryanKh. A. 2008. “Factorization of a Convolution-Type Integro-Differential Equation on the Positive Half Line”. Ukrains’kyi Matematychnyi Zhurnal 60 (11), 1555–1567. https://umj.imath.kiev.ua/index.php/umj/article/view/3269.