Voir la notice de l'article provenant de la source Math-Net.Ru
@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/} }
O. V. Besov; S. B. Stechkin. A~description of the moduli of continuity in $L_2$. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Theory of functions and its applications, Tome 134 (1975), pp. 23-25. http://geodesic.mathdoc.fr/item/TM_1975_134_a2/