@article{IM2_1971_5_4_a8,
     author = {V. P. Motornyi},
     title = {Approximation of functions by algebraic polynomials in the $L_p$ metric},
     journal = {Izvestiya. Mathematics },
     pages = {889--914},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_4_a8/}
}