@article{TIMM_2021_27_2_a5,
     author = {A. S. Bortakovskii},
     title = {Necessary optimality conditions for switching systems},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {67--78},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2021_27_2_a5/}
}