@article{IVM_1999_2_a7,
     author = {Yu. V. Masterkov},
     title = {On local controllability in the critical case},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {68--74},
     year = {1999},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1999_2_a7/}
}