@article{JRAM_1979__0307_0308_152132,
     author = {Reinhard Schertz},
     title = {\"Uber die analytische {Klassenzahlformel} f\"ur reelle abelsche {Zahlk\"orper.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {424--430},
     publisher = {mathdoc},
     volume = {0307_0308},
     year = {1979},
     zbl = {0423.12007},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1979__0307_0308_152132/}
}