Metwali, Mohamed M.A., and Kinga Cichoń. “On Solutions of Some Delay Volterra Integral Problems on a Half-Line”. Nonlinear Analysis: Modelling and Control 26, no. 4 (July 1, 2021): 661–677. Accessed May 2, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/24149.