@article{PMIHES_1974__43__47_0,
     author = {Floris Takens},
     title = {Singularities of vector fields},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {47--100},
     year = {1974},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {43},
     doi = {10.1007/BF02684366},
     mrnumber = {339292},
     zbl = {0279.58009},
     language = {en},
     url = {https://pmihes.centre-mersenne.org/articles/10.1007/BF02684366/}
}