@article{TM_1975_134_a2,
     author = {O. V. Besov and S. B. Stechkin},
     title = {A~description of the moduli of continuity in $L_2$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {23--25},
     publisher = {mathdoc},
     volume = {134},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1975_134_a2/}
}