%0 Journal Article %A A. Martínez-Finkelshtein %T On the rate of rational approximation of the function $\exp(-x)$ on the positive semi-axis %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1991 %P 94-96 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1991_6_a19/ %G ru %F VMUMM_1991_6_a19