@article{MZ_1991__208_3_174298,
     author = {Masanori Katsurada and Kohji Matsumoto},
     title = {Asymptotic expansions of the mean values of {Dirichlet} {L-functions.}},
     journal = {Mathematische Zeitschrift},
     pages = {23--40},
     year = {1991},
     volume = {208},
     number = {3},
     zbl = {0744.11041},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__208_3_174298/}
}