We prove a general theorem on fixed points of multivalued mappings that are not necessarily contractions and derive a number of recent contributions on this topic for contraction mappings.
"A General Fixed Point Theorem for Multivalued Mappings That Are Not Necessarily Contractions and Applications." Abstr. Appl. Anal. 2014 1 - 5, 2014. https://doi.org/10.1155/2014/104762