@article{IM_1978__46_142560,
     author = {Brian Marcus},
     title = {The {Horocycle} {Flow} is {Mixing} of all {Degrees.}},
     journal = {Inventiones mathematicae},
     pages = {201--210},
     publisher = {mathdoc},
     volume = {46},
     year = {1978},
     zbl = {0395.28012},
     url = {http://geodesic.mathdoc.fr/item/IM_1978__46_142560/}
}