%0 Journal Article
%A I. I. Parovichenko
%T On the structure of a class of set-theoretic operations
%J Doklady Akademii Nauk
%D 1977
%P 272-275
%V 237
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1977_237_2_a4/
%G ru
%F DAN_1977_237_2_a4