@article{IM_1983__73_143040,
     author = {J.S. Hsia and D.C. Hung},
     title = {Theta {Series} of {Ternary} and {Quaternary} {Quadratic} {Forms.}},
     journal = {Inventiones mathematicae},
     pages = {151--156},
     publisher = {mathdoc},
     volume = {73},
     year = {1983},
     zbl = {0513.10021},
     url = {http://geodesic.mathdoc.fr/item/IM_1983__73_143040/}
}