@article{TM_1987_180_a10,
     author = {V. F. Babenko},
     title = {Nonsymetric approximations and inequalities for rearrangements in extremal problems of approximation theory},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {33--35},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1987_180_a10/}
}