%0 Journal Article %A S. N. Samborskii %T Nonsmooth differentiation as an operator %J Contemporary Mathematics. Fundamental Directions %D 2010 %P 70-82 %V 37 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2010_37_a5/ %G ru %F CMFD_2010_37_a5