%0 Journal Article
%A Bärbel Wicha-Krause
%T On Embedded 2-Spheres in 3-Manifolds.
%J Mathematische Zeitschrift
%D 1983
%P 235-244
%V 184
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1983__184_173359/
%F MZ_1983__184_173359