Plotnikov, A. V., and N. V. Skripnik. “Conditions for the Existence of Local Solutions of Set-Valued Differential Equations With Generalized Derivative”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 65, no. 10, Oct. 2013, pp. 1350–1362, https://umj.imath.kiev.ua/index.php/umj/article/view/2514.