@article{10_1017_S0017089501010011,
     author = {Lluch, Ana},
     title = {Isometric immersions in the hyperbolic space with their image contained in a horoball},
     journal = {Glasgow mathematical journal},
     pages = {1--8},
     year = {2001},
     volume = {43},
     number = {1},
     doi = {10.1017/S0017089501010011},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089501010011/}
}