共 50 条
- [33] Best approximation theorem for set-valued mappings without convex values and continuity Yadian Yu Shengguang/Piezoelectrics and Acoustooptics, 1998, 20 (05): : 831 - 836
- [40] Lipschitz selections of set-valued mappings and Helly’s theorem The Journal of Geometric Analysis, 2002, 12 : 289 - 324