%0 Journal Article %A Michael Harris %T Non-vanishing of L-functions of 2 x 2 unitary groups. %J Forum mathematicum %D 1993 %P 405-420 %V 5 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FORUM_1993__5_3_141712/ %F FORUM_1993__5_3_141712