@article{ZVMMF_1964_4_3_a16,
     author = {M. B. Aksen'},
     title = {Upper bounds for approximations by quadrature formulae for certain classes of function},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {554--559},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1964_4_3_a16/}
}