%0 Journal Article %A Yu. A. Aminov %T An energy condition for the existence of a~rotation %J Sbornik. Mathematics %D 1971 %P 325-334 %V 15 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1971_15_2_a8/ %G en %F SM_1971_15_2_a8