@article{AFM_1995_20_2_a2,
     author = {Peter A. Perry},
     title = {A trace-class rigidity theorem for {Kleinian} groups},
     journal = {Annales Fennici Mathematici},
     pages = {251--257},
     year = {1995},
     volume = {20},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_1995_20_2_a2/}
}