@article{VMUMM_2020_2_a11,
     author = {D. I. Bugrov and A. M. Formal'sky},
     title = {Change of the attainability set after transition to a reduced system},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {58--60},
     publisher = {mathdoc},
     number = {2},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2020_2_a11/}
}