Ding, Zouhua, and Athanassios G. Kartsatos. “$p$-Regular Mappings and Alternative Results for Perturbations of $m$-Accretive Operators in Banach Spaces”. Topological Methods in Nonlinear Analysis 5, no. 2 (June 1, 1995): 291–304. Accessed July 8, 2025. https://apcz.umk.pl/TMNA/article/view/TMNA.1995.020.