@article{ZVMMF_1968_8_1_a3,
     author = {L. Kh. Tsovikyan},
     title = {An analog of multilinear functions for approximation in $W_2^2$},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {47--63},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1968_8_1_a3/}
}