%0 Journal Article
%A Ya. L. Kreinin
%T On $C\Phi$-kernels of sets effectively different from $\Phi$-sets
%J Doklady Akademii Nauk
%D 1965
%P 752-755
%V 165
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1965_165_4_a5/
%G ru
%F DAN_1965_165_4_a5