@article{TRSPY_1965_77_a2,
     author = {O. V. Besov},
     title = {Continuation of certain classes of differentiable functions beyond the boundary of a~region},
     journal = {Informatics and Automation},
     pages = {35--44},
     publisher = {mathdoc},
     volume = {77},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1965_77_a2/}
}