@article{GDZPPN002024772, title = {Orthogonal Steiner Systems.}, journal = {Aequationes mathematicae}, volume = {5}, year = {1970}, pages = {268-272}, zbl = {0212.03501}, url = {http://dml.mathdoc.fr/item/GDZPPN002024772} }
Mendelsohn, N.S. Orthogonal Steiner Systems.. Aequationes mathematicae, Tome 5 (1970) pp. 268-272. http://gdmltest.u-ga.fr/item/GDZPPN002024772/