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@article{IM_1966__2_141850, author = {I. JAMES and E. THOMAS}, title = {Submersions and {Immersions} of {Manifolds.}}, journal = {Inventiones mathematicae}, pages = {171--177}, publisher = {mathdoc}, volume = {2}, year = {1966}, zbl = {0146.19803}, url = {http://geodesic.mathdoc.fr/item/IM_1966__2_141850/} }
I. JAMES; E. THOMAS. Submersions and Immersions of Manifolds.. Inventiones mathematicae, Tome 2 (1966), pp. 171-177. http://geodesic.mathdoc.fr/item/IM_1966__2_141850/