%0 Journal Article
%A Ding, Xie Ping
%A Tan, Kok-Keong
%T A Set-Valued Generalization of Fan's Best Approximation Theorem
%J Canadian journal of mathematics
%D 1992
%P 784-796
%V 44
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1992-046-9/
%R 10.4153/CJM-1992-046-9
%F 10_4153_CJM_1992_046_9