@article{MZM_1992_52_3_a5,
     author = {V. I. Ivanov},
     title = {Lower bound on constant in {Jackson} inequality in different $L_p$-norms},
     journal = {Matemati\v{c}eskie zametki},
     pages = {48--62},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1992_52_3_a5/}
}