%0 Journal Article %A A. V. Kochergin %T On mixing in special flows over a shifting of segments and in smooth flows on surfaces %J Sbornik. Mathematics %D 1975 %P 441-469 %V 25 %N 3 %U http://geodesic.mathdoc.fr/item/SM_1975_25_3_a6/ %G en %F SM_1975_25_3_a6