%0 Journal Article
%A Z. I. Kozlova
%T An $R$-operation with complete depth of chains over systems of sets of power~$\tau$
%J Doklady Akademii Nauk
%D 1970
%P 521-524
%V 193
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1970_193_3_a5/
%G ru
%F DAN_1970_193_3_a5