@article{MAN_1988__281_4_164414,
     author = {J\"urg Kramer},
     title = {On the {Linear} {Independence} of {Certain} {Theta-Series.}},
     journal = {Mathematische Annalen},
     pages = {219--228},
     publisher = {mathdoc},
     volume = {281},
     number = {4},
     year = {1988},
     zbl = {0616.10019},
     url = {http://geodesic.mathdoc.fr/item/MAN_1988__281_4_164414/}
}