On 2-spheres in 3-manifolds
Whitehead, J. H. C.
Bull. Amer. Math. Soc., Tome 64 (1958) no. 6, p. 161-166 / Harvested from Project Euclid
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Publié le : 1958-07-14
Classification:  
@article{1183522555,
     author = {Whitehead, J. H. C.},
     title = {On 2-spheres in 3-manifolds},
     journal = {Bull. Amer. Math. Soc.},
     volume = {64},
     number = {6},
     year = {1958},
     pages = { 161-166},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1183522555}
}

Whitehead, J. H. C. On 2-spheres in 3-manifolds. Bull. Amer. Math. Soc., Tome 64 (1958) no. 6, pp.  161-166. http://gdmltest.u-ga.fr/item/1183522555/