%0 Journal Article
%A Ding Xie Ping
%T Weak conctrator 

 directions and weak directional constructions for a set valued operator with 

 a closed range
%J Novi Sad Journal of Mathematics
%D 1993
%P 39-50
%V 23
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NSJOM_1993_23_1a_3/
%F NSJOM_1993_23_1a_3