@article{IM_1996__123_3_144346,
     author = {Viktor Schroeder and Christoph Hummel},
     title = {Cusp closing in rank one symmetric spaces.},
     journal = {Inventiones mathematicae},
     pages = {283--308},
     year = {1996},
     volume = {123},
     number = {3},
     zbl = {0860.53025},
     url = {http://geodesic.mathdoc.fr/item/IM_1996__123_3_144346/}
}