@article{IVM_1987_7_a1,
     author = {V. A. Baskakov},
     title = {Comparison of orders of approximation of the classes $W^rH_{\omega p}$ by linear polynomial operators},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {7--11},
     publisher = {mathdoc},
     number = {7},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1987_7_a1/}
}