TY - JOUR AU - Marsden, J. E. TI - Non-Smooth Geodesic Flows and Classical Mechanics JO - Canadian mathematical bulletin PY - 1969 SP - 209 EP - 212 VL - 12 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-023-0/ DO - 10.4153/CMB-1969-023-0 ID - 10_4153_CMB_1969_023_0 ER -