%0 Journal Article %A E. A. Nadaraya %T On a~quadratic measure of the deviation of projection density estimates %J Teoriâ veroâtnostej i ee primeneniâ %D 1976 %P 864-871 %V 21 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1976_21_4_a17/ %G ru %F TVP_1976_21_4_a17