@article{10_1090_S0894_0347_98_00263_X,
     author = {James, Kevin},
     title = {L-series with nonzero central critical value},
     journal = {Journal of the American Mathematical Society},
     pages = {635--641},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1998},
     doi = {10.1090/S0894-0347-98-00263-X},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-98-00263-X/}
}