@article{DE_2003_39_2_a13,
     author = {N. N. Rachkovskii},
     title = {Necessary {Cone} {Optimality} {Conditions} for {Trajectories} of {Discrete} {Inclusions}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {267--275},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_2_a13/}
}