@article{IM2_2015_79_2_a2,
     author = {S. B. Vakarchuk and A. N. Shchitov},
     title = {Estimates for the error of approximation of functions in $L_p^1$ by polynomials
},
     journal = {Izvestiya. Mathematics },
     pages = {257--287},
     publisher = {mathdoc},
     volume = {79},
     number = {2},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2015_79_2_a2/}
}