TY  - JOUR
AU  - Koichi Yano
TI  - The homotopy class of non-singular Morse-Smale vector fields on 3-manifolds.
JO  - Inventiones mathematicae
PY  - 1985
SP  - 435
EP  - 452
VL  - 80
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM_1985__80_143238/
ID  - IM_1985__80_143238
ER  -