Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1982_32_5_a8, author = {N. P. Korneichuk}, title = {Precise constant in {Jackson's} inequality for continuous periodic functions}, journal = {Matemati\v{c}eskie zametki}, pages = {669--674}, publisher = {mathdoc}, volume = {32}, number = {5}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1982_32_5_a8/} }
N. P. Korneichuk. Precise constant in Jackson's inequality for continuous periodic functions. Matematičeskie zametki, Tome 32 (1982) no. 5, pp. 669-674. http://geodesic.mathdoc.fr/item/MZM_1982_32_5_a8/