Ivanov, I. L., and V. I. Slyn'ko. “Conditions for the Stability of an Impulsive Linear Equation With Pure Delay”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 9 (September 25, 2009): 1200–1207. Accessed December 6, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/3092.