@article{JRAM_1936__174_149942,
     author = {Martin Eichler},
     title = {Untersuchungen in der {Zahlentheorie} der rationalen {Quaternionenalgebren.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {129--159},
     publisher = {mathdoc},
     volume = {174},
     year = {1936},
     zbl = {0013.24505},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1936__174_149942/}
}