%0 Journal Article %A F. S. Rofe-Beketov %T Operator theoretical proof of the Arnold alternation theorem and its generalization %J Žurnal matematičeskoj fiziki, analiza, geometrii %D 2005 %P 119-125 %V 12 %N 1 %U http://geodesic.mathdoc.fr/item/JMAG_2005_12_1_a8/ %G ru %F JMAG_2005_12_1_a8