%0 Journal Article %A Yu. D. Burago %T On proportional approximation of a~metric %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1965 %P 120-123 %V 76 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1965_76_a9/ %G ru %F TM_1965_76_a9