@article{10_4064_aa_1_1_83_86,
     author = {Carl Siegel},
     title = {\"Uber die {Classenzahl} quadratischer {Zahlk\"orper}},
     journal = {Acta Arithmetica},
     pages = {83--86},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1935},
     doi = {10.4064/aa-1-1-83-86},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-1-1-83-86/}
}