@article{CMH_1972__47_139499,
     author = {Irwin Kra},
     title = {On {Spaces} of {Kleinian} {Groups}},
     journal = {Commentarii mathematici Helvetici},
     pages = {53--69},
     publisher = {mathdoc},
     volume = {47},
     year = {1972},
     zbl = {0239.30020},
     url = {http://geodesic.mathdoc.fr/item/CMH_1972__47_139499/}
}