@article{RM_1991_46_2_a18,
     author = {S. M. Nikol'skii and P. L. Ul'yanov and Al. A. Privalov},
     title = {Fifth {Saratov} {Winter} {School} on {Theory} of {Functions} and {Approximations}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {46},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1991_46_2_a18/}
}