@article{JRAM_1941__183_183488,
     author = {Cahit Arf},
     title = {Untersuchungen \"uber quadratische {Formen} in {K\"orpern} der {Charakteristik} 2. {(Teil} {I.).}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {148--167},
     publisher = {mathdoc},
     volume = {183},
     year = {1941},
     zbl = {0025.01403},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1941__183_183488/}
}