@article{TRSPY_2003_243_a1,
     author = {S. M. Nikol'skii},
     title = {Besov {Spaces}},
     journal = {Informatics and Automation},
     pages = {9--12},
     publisher = {mathdoc},
     volume = {243},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2003_243_a1/}
}