@article{SM_1998_189_7_a0,
     author = {V. V. Volchkov},
     title = {Extremal problems on {Pompeiu} sets},
     journal = {Sbornik. Mathematics},
     pages = {955--976},
     year = {1998},
     volume = {189},
     number = {7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1998_189_7_a0/}
}