Benchohra, Mouffak, Lech Górniewicz, Sotiris K. Ntouyas, and Abdelghani Ouahab. “Impulsive Hyperbolic Differential Inclusions With Variable Times”. Topological Methods in Nonlinear Analysis 22, no. 2 (December 1, 2003): 319–329. Accessed December 15, 2025. https://apcz.umk.pl/TMNA/article/view/TMNA.2003.042.