@article{MZM_1972_12_1_a13,
     author = {M. B. A. Babaev},
     title = {On obtaining close estimates in the approximation of functions of many variables by sums of functions of a fewer number of variables},
     journal = {Matemati\v{c}eskie zametki},
     pages = {105--114},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_12_1_a13/}
}