%0 Journal Article %A V. V. Volchkov %T Extremal problems on Pompeiu sets %J Sbornik. Mathematics %D 1998 %P 955-976 %V 189 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1998_189_7_a0/ %G en %F SM_1998_189_7_a0