@article{CMUC_1966_7_2_a5,
     author = {H\'ajek, Otomar},
     title = {Differentiable representation of flows {(Preliminary} communication)},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {219--225},
     year = {1966},
     volume = {7},
     number = {2},
     mrnumber = {0198452},
     zbl = {0144.22401},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1966_7_2_a5/}
}