%0 Journal Article %A N. G. Parvatov %T About finite lower neighbourhood in functional space %J Prikladnaâ diskretnaâ matematika %D 2009 %P 11 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/PDM_2009_10_a3/ %G ru %F PDM_2009_10_a3