TY  - JOUR
AU  - Stong, R. E.
TI  - Semi-characteristics and free group actions
JO  - Compositio Mathematica
PY  - 1974
SP  - 223
EP  - 248
VL  - 29
IS  - 3
PB  - Noordhoff International Publishing
UR  - http://archive.numdam.org/item/CM_1974__29_3_223_0/
LA  - en
ID  - CM_1974__29_3_223_0
ER  -