@article{DAN_1985_283_4_a11,
     author = {B. Mordukhovich},
     title = {On necessary conditions for an extremum in nonsmooth optimization},
     journal = {Doklady Akademii Nauk},
     pages = {816--822},
     publisher = {mathdoc},
     volume = {283},
     number = {4},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_283_4_a11/}
}