MartynyukD. I., and FodchukV. I. “Asymptotic Integration of Quasilinear Autonomous Systems With Delay”. Ukrains’kyi Matematychnyi Zhurnal 18, no. 4 (June 28, 1966): 117-121. Accessed September 1, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8320.