@article{TM_1987_180_a49,
     author = {L. D. Gogoladze},
     title = {On the approximation of functions of several variables by linear means},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {92--93},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1987_180_a49/}
}