%0 Journal Article %A D.R. Heath-Brown %T An asymptotic series for the mean value of Dirichlet L-functions. %J Commentarii mathematici Helvetici %D 1981 %P 148-162 %V 56 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1981__56_139864/ %F CMH_1981__56_139864