@article{AIHPB_1973__9_4_397_0,
     author = {Dang-Ngoc-Nghiem},
     title = {On the classification of dynamical systems},
     journal = {Annales de l'I.H.P. Probabilit\'es et statistiques},
     pages = {397--425},
     publisher = {Gauthier-Villars},
     volume = {9},
     number = {4},
     year = {1973},
     mrnumber = {335755},
     zbl = {0278.58009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPB_1973__9_4_397_0/}
}