Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1939__12_138753, author = {W. Habicht}, title = {\"Uber die {Zerlegung} strikte definiter {Formen} in {Quadrate.}}, journal = {Commentarii mathematici Helvetici}, pages = {317--322}, publisher = {mathdoc}, volume = {12}, year = {1939}, zbl = {66.0051.01}, url = {http://geodesic.mathdoc.fr/item/CMH_1939__12_138753/} }
W. Habicht. Über die Zerlegung strikte definiter Formen in Quadrate.. Commentarii mathematici Helvetici, Tome 12 (1939), pp. 317-322. http://geodesic.mathdoc.fr/item/CMH_1939__12_138753/