%0 Journal Article %A V. V. Volchkov %T Extremal problems on Pompeiu sets. II %J Sbornik. Mathematics %D 2000 %P 619-632 %V 191 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2000_191_5_a0/ %G en %F SM_2000_191_5_a0