PlotnikovA. V., and SkripnikN. V. 2013. “Conditions for the Existence of Local Solutions of Set-Valued Differential Equations With Generalized Derivative”. Ukrains’kyi Matematychnyi Zhurnal 65 (10), 1350–1362. https://umj.imath.kiev.ua/index.php/umj/article/view/2514.