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@article{MAN_1973__203_162430, author = {G. Ananda Swarup}, title = {On {Embedded} {Spheres} in 3-manifolds.}, journal = {Mathematische Annalen}, pages = {89--102}, publisher = {mathdoc}, volume = {203}, year = {1973}, zbl = {0241.55017}, url = {http://geodesic.mathdoc.fr/item/MAN_1973__203_162430/} }
G. Ananda Swarup. On Embedded Spheres in 3-manifolds.. Mathematische Annalen, Tome 203 (1973), pp. 89-102. http://geodesic.mathdoc.fr/item/MAN_1973__203_162430/