%0 Journal Article
%A S. A. Feodorov
%T An approach to the estimation of measure and cardinality of balls
%J Doklady Akademii Nauk
%D 1984
%P 1360-1364
%V 276
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1984_276_6_a19/
%G ru
%F DAN_1984_276_6_a19