@article{ZNSL_2017_461_a2,
     author = {M. I. Belishev},
     title = {Local boundary controllability in classes of differentiable functions for the wave equation},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {52--64},
     publisher = {mathdoc},
     volume = {461},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2017_461_a2/}
}