@article{IM_1976__38_142439,
     author = {H. Jacquet and J.A. Shalika},
     title = {A {Non-Vanishing} {Theorem} for {Zeta} {Functions} of {GLn}},
     journal = {Inventiones mathematicae},
     pages = {1--16},
     publisher = {mathdoc},
     volume = {38},
     year = {1976},
     zbl = {0349.12006},
     url = {http://geodesic.mathdoc.fr/item/IM_1976__38_142439/}
}