@article{10_4153_CMB_1969_023_0,
     author = {Marsden, J. E.},
     title = {Non-Smooth {Geodesic} {Flows} and {Classical} {Mechanics}},
     journal = {Canadian mathematical bulletin},
     pages = {209--212},
     year = {1969},
     volume = {12},
     number = {2},
     doi = {10.4153/CMB-1969-023-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-023-0/}
}