@article{GDZPPN000366757, title = {On the Number of Views of Polyhedral Terrains.}, journal = {Discrete \& computational geometry}, volume = {11}, year = {1994}, pages = {177-182}, zbl = {0809.52011}, url = {http://dml.mathdoc.fr/item/GDZPPN000366757} }
Sharir, M.; Agarwal, P.K. On the Number of Views of Polyhedral Terrains.. Discrete & computational geometry, Tome 11 (1994) pp. 177-182. http://gdmltest.u-ga.fr/item/GDZPPN000366757/