%0 Journal Article
%A Ya. L. Kreinin
%T About a property of sets effectively different from all $\Phi$-sets
%J Doklady Akademii Nauk
%D 1958
%P 237-238
%V 118
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1958_118_2_a7/
%G ru
%F DAN_1958_118_2_a7