@article{GDZPPN000367168, title = {Bounding the Piercing Number.}, journal = {Discrete \& computational geometry}, volume = {13}, year = {1995}, pages = {245-256}, zbl = {0826.52006}, url = {http://dml.mathdoc.fr/item/GDZPPN000367168} }
Kalai, G.; Alon, N. Bounding the Piercing Number.. Discrete & computational geometry, Tome 13 (1995) pp. 245-256. http://gdmltest.u-ga.fr/item/GDZPPN000367168/