@article{MM2_1992__76_1_155761,
     author = {Ruth I. Berger},
     title = {Hasse's {Class} {Number} {Product} {Formula} for {Generalized} {Dirichlet} {Fields} and other types of {Number} {Fields.}},
     journal = {Manuscripta mathematica},
     pages = {397--406},
     publisher = {mathdoc},
     volume = {76},
     number = {1},
     year = {1992},
     zbl = {0779.11051},
     url = {http://geodesic.mathdoc.fr/item/MM2_1992__76_1_155761/}
}