@article{JRAM_1938__178_150022,
     author = {Hel Braun},
     title = {\"Uber die {Zerlegung} quadratischer {Formen} in {Quadrate.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {34--64},
     publisher = {mathdoc},
     volume = {178},
     year = {1938},
     zbl = {0017.19609},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1938__178_150022/}
}