Górniewicz, Lech, Sotiris K. Ntouyas, and Donal O’Regan. 2005. “Existence Results for First and Second Order Semilinear Impulsive Differential Inclusions”. Topological Methods in Nonlinear Analysis 26 (1):135-62. https://apcz.umk.pl/TMNA/article/view/TMNA.2005.028.