@article{GDZPPN002254603, title = {Concerning triple systems}, journal = {Mathematische Annalen}, volume = {41}, year = {1893}, pages = {271-285}, zbl = {25.0198.02}, url = {http://dml.mathdoc.fr/item/GDZPPN002254603} }
Moore, E. Concerning triple systems. Mathematische Annalen, Tome 41 (1893) pp. 271-285. http://gdmltest.u-ga.fr/item/GDZPPN002254603/