TY  - JOUR
AU  - Wolfgang Ziller
AU  - Hermann Gluck
TI  - On the volume of a unit vector field on the three-sphere.
JO  - Commentarii mathematici Helvetici
PY  - 1986
SP  - 177
EP  - 192
VL  - 61
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1986__61_140047/
ID  - CMH_1986__61_140047
ER  -