%0 Journal Article %A Bellow, A. %A Calderón, A. P. %T Hopf's Ergodic Theorem for Particles with Different Velocities and the "Strong Sweeping out Property" %J Canadian mathematical bulletin %D 1995 %P 11-15 %V 38 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1995-002-0/ %R 10.4153/CMB-1995-002-0 %F 10_4153_CMB_1995_002_0