@article{SM_2000_191_5_a6,
     author = {I. I. Sharapudinov},
     title = {Approximation of functions of variable smoothness by {Fourier{\textendash}Legendre} sums},
     journal = {Sbornik. Mathematics},
     pages = {759--777},
     year = {2000},
     volume = {191},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2000_191_5_a6/}
}