Samoilenko, A. M. “On One Problem of the Investigation of Global Solutions of Linear Differential Equations With Deviating Argument”. Ukrains’kyi Matematychnyi Zhurnal 55, no. 5 (May 25, 2003): 631-640. Accessed May 17, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3939.