@article{1256059669, author = {Mann, H. B.}, title = {Balanced incomplete block designs and Abelian difference sets}, journal = {Illinois J. Math.}, volume = {8}, number = {4}, year = {1964}, pages = { 252-261}, language = {en}, url = {http://dml.mathdoc.fr/item/1256059669} }
Mann, H. B. Balanced incomplete block designs and Abelian difference sets. Illinois J. Math., Tome 8 (1964) no. 4, pp. 252-261. http://gdmltest.u-ga.fr/item/1256059669/