@article{01730451, title = {Note on span-symmetric generalized quadrangles.}, journal = {Advances in Geometry}, volume = {2}, year = {2002}, pages = {197-200}, doi = {10.1515/advg.2002.006}, zbl = {0998.51003}, language = {en}, url = {http://dml.mathdoc.fr/item/01730451} }
Kantor, William M. Note on span-symmetric generalized quadrangles.. Advances in Geometry, Tome 2 (2002) pp. 197-200. doi : 10.1515/advg.2002.006. http://gdmltest.u-ga.fr/item/01730451/