@article{AM2_1977__15_136636,
     author = {Joachim R\"ohmel},
     title = {Eine {Charakterisierung} quadratischer {Formen} durch eine {Funktionengleichung.} {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {112--112},
     publisher = {mathdoc},
     volume = {15},
     year = {1977},
     zbl = {0361.10021},
     url = {http://geodesic.mathdoc.fr/item/AM2_1977__15_136636/}
}