Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1968__23_140879, author = {P. Hafner}, title = {Automorphismen von bin\"aren quadratischen {Formen.}}, journal = {Elemente der Mathematik}, pages = {25--30}, publisher = {mathdoc}, volume = {23}, year = {1968}, zbl = {0157.07104}, url = {http://geodesic.mathdoc.fr/item/ELMA_1968__23_140879/} }
P. Hafner. Automorphismen von binären quadratischen Formen.. Elemente der Mathematik, Tome 23 (1968), pp. 25-30. http://geodesic.mathdoc.fr/item/ELMA_1968__23_140879/