@article{IM2_1984_22_2_a0,
     author = {M. K. Akbarov},
     title = {On the quadratic mean over arithmetic progressions of the {Fourier} coefficients of cusp forms},
     journal = {Izvestiya. Mathematics},
     pages = {191--209},
     year = {1984},
     volume = {22},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1984_22_2_a0/}
}