@article{701564,
title = {Geometrical directions and ends of a manifold, points of accumulation of a direction of a group in the hyperbolic space $H^2$
},
booktitle = {Proceedings of the Winter School "Geometry and Physics"},
series = {GDML\_Books},
publisher = {Circolo Matematico di Palermo},
address = {Palermo},
year = {1996},
pages = {[37]-56},
mrnumber = {MR1396601},
zbl = {0867.53040},
url = {http://dml.mathdoc.fr/item/701564}
}
Biś, Andrzej. Geometrical directions and ends of a manifold, points of accumulation of a direction of a group in the hyperbolic space $H^2$
, dans Proceedings of the Winter School "Geometry and Physics", GDML_Books, (1996), pp. [37]-56. http://gdmltest.u-ga.fr/item/701564/