Gurova, Irina. “Semidiscretization Schemes for the Autonomous Differential Equations With Noncompact Semigroups Using Functionalizing Parameter Method”. Topological Methods in Nonlinear Analysis 14, no. 2 (December 1, 1999): 385–394. Accessed April 25, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.1999.041.