%0 Journal Article
%A Z. I. Kozlova
%T Certain $\Delta\Sigma$-operations whose bases are obtained by uniting the chains of the base of the original operation
%J Doklady Akademii Nauk
%D 1969
%P 1001-1003
%V 188
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_188_5_a9/
%G ru
%F DAN_1969_188_5_a9