@article{IM_1988__91_3_143530,
     author = {David Fried},
     title = {Torsion and closed geodesics on complex hyperbolic manfolds.},
     journal = {Inventiones mathematicae},
     pages = {31--52},
     publisher = {mathdoc},
     volume = {91},
     number = {3},
     year = {1988},
     zbl = {0658.53061},
     url = {http://geodesic.mathdoc.fr/item/IM_1988__91_3_143530/}
}