@article{GDZPPN002031167, title = {Orthogonal systems.}, journal = {Aequationes mathematicae}, volume = {18}, year = {1978}, pages = {322-330}, zbl = {0377.05012}, url = {http://dml.mathdoc.fr/item/GDZPPN002031167} }
Vanstone, S.A.; Mullin, R.C.; Deza, M. Orthogonal systems.. Aequationes mathematicae, Tome 18 (1978) pp. 322-330. http://gdmltest.u-ga.fr/item/GDZPPN002031167/