@article{DAN_1976_227_2_a3,
     author = {A. A. Zhensykbaev},
     title = {On the best quadrature formula on the class $W^rL_p$},
     journal = {Doklady Akademii Nauk},
     pages = {277--279},
     publisher = {mathdoc},
     volume = {227},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_227_2_a3/}
}