@article{TRSPY_1976_140_a2,
     author = {O. V. Besov},
     title = {Multiplicative estimates of integral moduli of smoothness},
     journal = {Informatics and Automation},
     pages = {21--26},
     publisher = {mathdoc},
     volume = {140},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1976_140_a2/}
}