@article{DAN_1968_183_4_a10,
     author = {V. M. Mordashev},
     title = {Approximation of a function of many variables by a sum of functions of a smaller number of variables},
     journal = {Doklady Akademii Nauk},
     pages = {778--779},
     publisher = {mathdoc},
     volume = {183},
     number = {4},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_4_a10/}
}