%0 Journal Article %A M. K. Akbarov %T On mean square Fourier coefficients of cusp forms over arithmetic progressions %J Doklady Akademii Nauk %D 1981 %P 521-523 %V 261 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_261_3_a0/ %G ru %F DAN_1981_261_3_a0