@article{IM2_1975_9_2_a0,
     author = {A. N. Andrianov and G. N. Maloletkin},
     title = {Behavior of theta series of degree~$n$ under modular substitutions},
     journal = {Izvestiya. Mathematics },
     pages = {227--241},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1975_9_2_a0/}
}