@article{10_4064_aa140_3_4,
     author = {Anatoli Andrianov},
     title = {Interaction sums and action of {Hecke} operators
 on theta-series},
     journal = {Acta Arithmetica},
     pages = {271--304},
     publisher = {mathdoc},
     volume = {140},
     number = {3},
     year = {2009},
     doi = {10.4064/aa140-3-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa140-3-4/}
}