@article{AA_2009_21_6_a7,
     author = {A. Olevskiǐ and A. Ulanovskiǐ},
     title = {Approximation of discrete functions and size of spectrum},
     journal = {Algebra i analiz},
     pages = {227--240},
     publisher = {mathdoc},
     volume = {21},
     number = {6},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AA_2009_21_6_a7/}
}