@article{02040370, title = {A four-class association scheme derived from a hyperbolic quadric in }, journal = {Advances in Geometry}, volume = {4}, year = {2004}, pages = {105-117}, doi = {10.1515/advg.2004.001}, zbl = {1036.05051}, language = {en}, url = {http://dml.mathdoc.fr/item/02040370} }
Fujisaki, Tatsuya. A four-class association scheme derived from a hyperbolic quadric in . Advances in Geometry, Tome 4 (2004) pp. 105-117. doi : 10.1515/advg.2004.001. http://gdmltest.u-ga.fr/item/02040370/