%0 Journal Article
%A Guo-Qiang Zhang
%A Gongqin Shen
%T Approximable Concepts, Chu spaces, and  information systems
%J Theory and applications of categories
%D 2006
%P 79-102
%V 17
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TAC_2006_17_a4/
%G en
%F TAC_2006_17_a4