@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/} }