@article{02142913, title = {Association schemes of affine type over finite rings.}, journal = {Advances in Geometry}, volume = {4}, year = {2004}, pages = {241-261}, doi = {10.1515/advg.2004.015}, zbl = {1117.05112}, language = {en}, url = {http://dml.mathdoc.fr/item/02142913} }
Tanaka, Hajime. Association schemes of affine type over finite rings.. Advances in Geometry, Tome 4 (2004) pp. 241-261. doi : 10.1515/advg.2004.015. http://gdmltest.u-ga.fr/item/02142913/