@article{SM_2011_202_2_a4,
     author = {P. A. Terekhin},
     title = {Best approximation of functions in $L_p$ by polynomials on affine system},
     journal = {Sbornik. Mathematics},
     pages = {279--306},
     publisher = {mathdoc},
     volume = {202},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2011_202_2_a4/}
}