@article{MM2_1984__47_155014,
     author = {Eduard Zehnder},
     title = {The topological behaviour of a diffeomorphism near a fixed point.},
     journal = {Manuscripta mathematica},
     pages = {251--262},
     publisher = {mathdoc},
     volume = {47},
     year = {1984},
     zbl = {0543.58021},
     url = {http://geodesic.mathdoc.fr/item/MM2_1984__47_155014/}
}