Geodesic
Smooth spheres in IR4 with four critical points are standard.
Inventiones mathematicae, Tome 79 (1985), pp. 125-142 Cet article a éte moissonné depuis la source European Digital Mathematics Library

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Mots-clés : knotted 2-spheres, band-sum of knots, knots in the 3-sphere, planar surfaces embedded in general position in a 3-manifold, planar graphs 
@article{IM_1985__79_143188,
     author = {Martin Scharlemann},
     title = {Smooth spheres in {IR4} with four critical points are standard.},
     journal = {Inventiones mathematicae},
     pages = {125--142},
     year = {1985},
     volume = {79},
     zbl = {0559.57019},
     url = {http://geodesic.mathdoc.fr/item/IM_1985__79_143188/}
}
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TI  - Smooth spheres in IR4 with four critical points are standard.
JO  - Inventiones mathematicae
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SP  - 125
EP  - 142
VL  - 79
UR  - http://geodesic.mathdoc.fr/item/IM_1985__79_143188/
ID  - IM_1985__79_143188
ER  - 
%0 Journal Article
%A Martin Scharlemann
%T Smooth spheres in IR4 with four critical points are standard.
%J Inventiones mathematicae
%D 1985
%P 125-142
%V 79
%U http://geodesic.mathdoc.fr/item/IM_1985__79_143188/
%F IM_1985__79_143188
Martin Scharlemann. Smooth spheres in IR4 with four critical points are standard.. Inventiones mathematicae, Tome 79 (1985), pp. 125-142. http://geodesic.mathdoc.fr/item/IM_1985__79_143188/