@article{MZM_1979_25_1_a9,
     author = {A. S. Shvedov},
     title = {Jackson's theorem in $L^p$, $0<p<1$, for algebraic polynomials, and orders of comonotone approximations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {107--117},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1979_25_1_a9/}
}