@article{ZVMMF_2016_56_11_a2,
     author = {V. I. Elkin},
     title = {Systems of {Pfaffian} equations and controlled systems},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1863--1871},
     publisher = {mathdoc},
     volume = {56},
     number = {11},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2016_56_11_a2/}
}