@article{DAN_1962_142_3_a7,
     author = {L. P. Lebedev},
     title = {Effective construction of methods of best approximation},
     journal = {Doklady Akademii Nauk},
     pages = {530--533},
     publisher = {mathdoc},
     volume = {142},
     number = {3},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_3_a7/}
}