%0 Journal Article
%A A. G. El'kin
%T On the construction of $\rho$-maximal spaces using expansions relative to centered $\rho$-systems
%J Doklady Akademii Nauk
%D 1973
%P 793-795
%V 212
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1973_212_4_a2/
%G ru
%F DAN_1973_212_4_a2