@article{MZ_1956__64_169569,
     author = {Martin Eichler},
     title = {Der {Hilbertsche} {Klassenk\"orper} eines imagin\"arquadratischen {Zahlk\"orpers.}},
     journal = {Mathematische Zeitschrift},
     pages = {229--242},
     publisher = {mathdoc},
     volume = {64},
     year = {1956},
     zbl = {0074.02905},
     url = {http://geodesic.mathdoc.fr/item/MZ_1956__64_169569/}
}