@article{IM_1969__7_141969,
     author = {A.P. OGG},
     title = {On a {Convolution} of {L-Series.}},
     journal = {Inventiones mathematicae},
     pages = {297--312},
     year = {1969},
     volume = {7},
     zbl = {0205.50902},
     url = {http://geodesic.mathdoc.fr/item/IM_1969__7_141969/}
}