@article{JRAM_1989__395_153114,
     author = {J\"urgen Berndt},
     title = {Real hypersurfaces with constant principal curvatures in complex hyperbolic space.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {132--141},
     publisher = {mathdoc},
     volume = {395},
     year = {1989},
     zbl = {0655.53046},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1989__395_153114/}
}