%0 Journal Article %A S. A. Stepanov %T Method of orbit sums in the theory of %J Sbornik. Mathematics %D 2006 %P 1635-1667 %V 197 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2006_197_11_a4/ %G en %F SM_2006_197_11_a4