@article{SM_1978_34_1_a0,
     author = {A. P. Bulanov},
     title = {Approximation, by rational functions, of convex functions with given modulus of continuity},
     journal = {Sbornik. Mathematics},
     pages = {1--24},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1978},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1978_34_1_a0/}
}