@article{TM_2020_308_a6,
     author = {A. S. Bortakovskii},
     title = {Sufficient {Optimality} {Conditions} for {Hybrid} {Systems} of {Variable} {Dimension}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {88--100},
     publisher = {mathdoc},
     volume = {308},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2020_308_a6/}
}