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@article{TRSPY_1992_198_a12, author = {N. I. Chernykh}, title = {Exzact {Jackson} inequality in $L_p(0,2\pi)$ $(1\le p<2)$}, journal = {Informatics and Automation}, pages = {232--241}, publisher = {mathdoc}, volume = {198}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1992_198_a12/} }
N. I. Chernykh. Exzact Jackson inequality in $L_p(0,2\pi)$ $(1\le p<2)$. Informatics and Automation, Proceedings of the All-Union school on the theory of functions, Tome 198 (1992), pp. 232-241. http://geodesic.mathdoc.fr/item/TRSPY_1992_198_a12/