TY  - JOUR
AU  - Wise, Daniel
TI  - Nonpositive immersions, sectional curvature, and subgroup properties
JO  - Electronic research announcements of the American Mathematical Society
PY  - 2003
SP  - 1
EP  - 9
VL  - 09
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-03-00105-7/
DO  - 10.1090/S1079-6762-03-00105-7
ID  - ERAAMS_2003_09_a0
ER  -