@article{ASNSP_1975_4_2_4_611_0,
     author = {Goldfeld, Dorian},
     title = {An asymptotic formula relating the {Siegel} zero and the class number of quadratic fields},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {611--615},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 2},
     number = {4},
     year = {1975},
     mrnumber = {404212},
     zbl = {0327.10042},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1975_4_2_4_611_0/}
}