@article{CMFD_2009_34_a5,
     author = {I. V. Orlov and F. S. Stonyakin},
     title = {Compact subdifferentials: the formula of finite increments and related topics},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {121--138},
     publisher = {mathdoc},
     volume = {34},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2009_34_a5/}
}