Kim, Soon Kyu; Wang, Tixiang On fixed point theorems for multi-valued mappings on metric spaces. (English) Zbl 1273.54062 Commun. Korean Math. Soc. 2, No. 2, 235-242 (1987). MSC: 54H25 Fixed-point and coincidence theorems (topological aspects) × Cite Format Result Cite Review PDF