TY  - JOUR
AU  - Guo-Qiang Zhang
AU  - Gongqin Shen
TI  - Approximable Concepts, Chu spaces, and  information systems
JO  - Theory and applications of categories
PY  - 2006
SP  - 79
EP  - 102
VL  - 17
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TAC_2006_17_a4/
LA  - en
ID  - TAC_2006_17_a4
ER  -