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@article{MZ_1979__166_172821, author = {Sebastian J. van Strien}, title = {Center {Manifolds} are not {C...}}, journal = {Mathematische Zeitschrift}, pages = {143--146}, publisher = {mathdoc}, volume = {166}, year = {1979}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MZ_1979__166_172821/} }
Sebastian J. van Strien. Center Manifolds are not C.... Mathematische Zeitschrift, Tome 166 (1979), pp. 143-146. http://geodesic.mathdoc.fr/item/MZ_1979__166_172821/