@article{JRAM_1994__450_153613,
     author = {Keith Burns and Marlies Gerber},
     title = {Ergodic geodesic flows on product manifolds with low dimensional factors.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--36},
     publisher = {mathdoc},
     volume = {450},
     year = {1994},
     zbl = {0802.58043},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1994__450_153613/}
}