@article{RM_1993_48_4_a15,
     author = {S. M. Nikol'skii and A. M. Bogomolov and Al. A. Privalov},
     title = {Sixth {Saratov} {Winter} {School} on {Theory} of {Functions} and {Approximations}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1993},
     volume = {48},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1993_48_4_a15/}
}