%0 Journal Article %A M. A. Skryabin %T Partition of unity and the strong ellipticity problem for functional differential operators %J Contemporary Mathematics. Fundamental Directions %D 2009 %P 139-151 %V 34 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2009_34_a6/ %G ru %F CMFD_2009_34_a6