@article{GDZPPN002085399, title = {Hyperbolic lines in generalized polygons.}, journal = {Forum mathematicum}, volume = {8}, year = {1996}, pages = {343-362}, zbl = {0854.51004}, url = {http://dml.mathdoc.fr/item/GDZPPN002085399} }
Bon, J. van; Cuypers, H.; Maldeghem, H. Hyperbolic lines in generalized polygons.. Forum mathematicum, Tome 8 (1996) pp. 343-362. http://gdmltest.u-ga.fr/item/GDZPPN002085399/