%0 Journal Article
%A N. M. Ermolaeva
%T Arithmetic sums of recursively-projective sets
%J Doklady Akademii Nauk
%D 1967
%P 1011-1013
%V 172
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_172_5_a4/
%G ru
%F DAN_1967_172_5_a4