@article{JTNB_2004__16_3_587_0,
     author = {Konyagin, Sergei V. and Lev, Vsevolod F.},
     title = {Character sums in complex half-planes},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {587--606},
     publisher = {Universit\'e Bordeaux 1},
     volume = {16},
     number = {3},
     year = {2004},
     doi = {10.5802/jtnb.463},
     zbl = {1068.43004},
     mrnumber = {2144960},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/jtnb.463/}
}