@article{GDZPPN002084791, title = {Non-vanishing of L-functions of 2 x 2 unitary groups.}, journal = {Forum mathematicum}, volume = {5}, year = {1993}, pages = {405-420}, zbl = {0779.11024}, url = {http://dml.mathdoc.fr/item/GDZPPN002084791} }
Harris, Michael. Non-vanishing of L-functions of 2 x 2 unitary groups.. Forum mathematicum, Tome 5 (1993) pp. 405-420. http://gdmltest.u-ga.fr/item/GDZPPN002084791/