Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{IM_1969__7_141958, author = {R.A. NORMAN}, title = {Dehn's {Lemma} for {Certain} {4-Manifolds.}}, journal = {Inventiones mathematicae}, pages = {143--147}, publisher = {mathdoc}, volume = {7}, year = {1969}, zbl = {0181.51602}, url = {http://geodesic.mathdoc.fr/item/IM_1969__7_141958/} }
R.A. NORMAN. Dehn's Lemma for Certain 4-Manifolds.. Inventiones mathematicae, Tome 7 (1969), pp. 143-147. http://geodesic.mathdoc.fr/item/IM_1969__7_141958/