%0 Journal Article %A Duke, W. %A Iwaniec, H. %T Convolution $L$-series %J Compositio Mathematica %D 1994 %P 145-158 %V 91 %N 2 %I Kluwer Academic Publishers %U http://archive.numdam.org/item/CM_1994__91_2_145_0/ %G en %F CM_1994__91_2_145_0