@article{JRAM_1923__152_149526,
     author = {Helmut Hasse},
     title = {\"Uber die {\"Aquivalenz} quadratischer {Formen} im {K\"orper} der rationalen {Zahlen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {205--224},
     publisher = {mathdoc},
     volume = {152},
     year = {1923},
     zbl = {49.0102.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1923__152_149526/}
}