@article{1242071687, author = {Cameron, Peter}, title = {Root systems and optimal block designs}, journal = {Michigan Math. J.}, volume = {58}, number = {1}, year = {2009}, pages = { 181-194}, language = {en}, url = {http://dml.mathdoc.fr/item/1242071687} }
Cameron, Peter. Root systems and optimal block designs. Michigan Math. J., Tome 58 (2009) no. 1, pp. 181-194. http://gdmltest.u-ga.fr/item/1242071687/