@article{GDZPPN002316978,
title = {The Family of Horospheres Through Two Points.},
journal = {Mathematische Annalen},
volume = {243},
year = {1979},
pages = {1-12},
zbl = {0379.53020},
url = {http://dml.mathdoc.fr/item/GDZPPN002316978}
}
Im Hof, Hans Christoph. The Family of Horospheres Through Two Points.. Mathematische Annalen, Tome 243 (1979) pp. 1-12. http://gdmltest.u-ga.fr/item/GDZPPN002316978/