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@article{MZ_1927__26_167955, author = {J., A. Schouten}, title = {\"Uber n-fache {Orthogonalsysteme} in {V?}}, journal = {Mathematische Zeitschrift}, pages = {706--730}, publisher = {mathdoc}, volume = {26}, year = {1927}, zbl = {53.0685.03}, url = {http://geodesic.mathdoc.fr/item/MZ_1927__26_167955/} }
J., A. Schouten. Über n-fache Orthogonalsysteme in V?. Mathematische Zeitschrift, Tome 26 (1927), pp. 706-730. http://geodesic.mathdoc.fr/item/MZ_1927__26_167955/