@article{JTNB_1998__10_1_49_0,
     author = {Codec\`a, Paolo and Dvornicich, Roberto and Zannier, Umberto},
     title = {Two problems related to the non-vanishing of $L (1, \chi )$},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {49--64},
     publisher = {Universit\'e Bordeaux I},
     volume = {10},
     number = {1},
     year = {1998},
     mrnumber = {1827285},
     zbl = {0929.11003},
     language = {en},
     url = {http://www.numdam.org/item/JTNB_1998__10_1_49_0/}
}