%0 Journal Article %A V. A. Ufnarovskii %T An independence theorem and its consequences %J Sbornik. Mathematics %D 1987 %P 121-129 %V 56 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1987_56_1_a7/ %G en %F SM_1987_56_1_a7