@article{DAN_1963_153_1_a13,
     author = {G. M. Henkin},
     title = {Imbedding the space of $s$-smooth functions of $n$~variables into a space of sufficiently smooth functions of fewer variables},
     journal = {Doklady Akademii Nauk},
     pages = {57--60},
     publisher = {mathdoc},
     volume = {153},
     number = {1},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_153_1_a13/}
}