@article{10_4064_aa_49_1_35_43,
     author = {Martin Eichler},
     title = {New formulas for the class number of imaginary quadratic fields},
     journal = {Acta Arithmetica},
     pages = {35--43},
     publisher = {mathdoc},
     volume = {49},
     number = {1},
     year = {1987},
     doi = {10.4064/aa-49-1-35-43},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-49-1-35-43/}
}