@article{TRSPY_1987_180_a8, author = {M.-B. Babayev}, title = {The approximation of sobolev classes of functions by sums of products of functions of fewer variables}, journal = {Informatics and Automation}, pages = {30--32}, publisher = {mathdoc}, volume = {180}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a8/} }