@article{articlea7bedd7b,
title   = {Horo-tight spheres in hyperbolic space},
author = {Buosi, Marcelo and Izumiya, Shyuichi and Ruas, Maria Aparecida Soares},
year = {2011},
doi = {10.1007/s10711-010-9565-9},
journal   = {Geometriae Dedicata}
}