TY  - JOUR
AU  - Wise, Daniel T.
TI  - Approximating Flats by Periodic Flats in CAT(0) Square Complexes
JO  - Canadian journal of mathematics
PY  - 2005
SP  - 416
EP  - 448
VL  - 57
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-2005-018-x/
DO  - 10.4153/CJM-2005-018-x
ID  - 10_4153_CJM_2005_018_x
ER  -