%0 Journal Article %A O. V. Lepskii %T Asymptotically minimax adaptive estimation. I. Upper bounds. Optimally adaptive estimates %J Teoriâ veroâtnostej i ee primeneniâ %D 1991 %P 645-659 %V 36 %N 4 %U http://geodesic.mathdoc.fr/item/TVP_1991_36_4_a2/ %G ru %F TVP_1991_36_4_a2