@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/}
}