Plotnikov, V. A., and L. I. Plotnikova. “Averaging of Differential Inclusions With Many-Valued Pulses”. Ukrains’kyi Matematychnyi Zhurnal 47, no. 11 (November 25, 1995): 1526–1532. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/5543.