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@article{MZM_1985_38_2_a8, author = {A. A. Ligun}, title = {Exact constants in inequalities of {Jackson} type}, journal = {Matemati\v{c}eskie zametki}, pages = {248--256}, publisher = {mathdoc}, volume = {38}, number = {2}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1985_38_2_a8/} }
A. A. Ligun. Exact constants in inequalities of Jackson type. Matematičeskie zametki, Tome 38 (1985) no. 2, pp. 248-256. http://geodesic.mathdoc.fr/item/MZM_1985_38_2_a8/