%0 Journal Article %A A. Yu. Volovikov %T Two theorems from the theory of periodic transformations %J Sbornik. Mathematics %D 1981 %P 119-125 %V 38 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1981_38_1_a8/ %G en %F SM_1981_38_1_a8