@article{GDZPPN002413841, title = {Nonisomorphic Steiner Triple System.}, journal = {Mathematische Zeitschrift}, volume = {135}, year = {1973}, pages = {303-314}, zbl = {0264.05009}, url = {http://dml.mathdoc.fr/item/GDZPPN002413841} }
Wilson, Richard M. Nonisomorphic Steiner Triple System.. Mathematische Zeitschrift, Tome 135 (1973) pp. 303-314. http://gdmltest.u-ga.fr/item/GDZPPN002413841/