Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1923__88_158975, author = {A. Hurwitz}, title = {\"Uber die {Komposition} der quadratischen {Formen.}}, journal = {Mathematische Annalen}, pages = {1--25}, publisher = {mathdoc}, volume = {88}, year = {1923}, language = {de}, url = {http://geodesic.mathdoc.fr/item/MAN_1923__88_158975/} }
A. Hurwitz. Über die Komposition der quadratischen Formen.. Mathematische Annalen, Tome 88 (1923), pp. 1-25. http://geodesic.mathdoc.fr/item/MAN_1923__88_158975/