%0 Journal Article %A V. S. Belonosov %T The spectral properties of distributions and asymptotic methods in perturbation theory %J Sbornik. Mathematics %D 2012 %P 307-325 %V 203 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2012_203_3_a0/ %G en %F SM_2012_203_3_a0