%0 Journal Article
%A Wolfgang Ziller
%A Hermann Gluck
%T On the volume of a unit vector field on the three-sphere.
%J Commentarii mathematici Helvetici
%D 1986
%P 177-192
%V 61
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1986__61_140047/
%F CMH_1986__61_140047