@article{AA_2001_13_3_a0,
     author = {S. A. Avdonin and S. A. Ivanov},
     title = {Exponential {Riesz} bases of subspaces and divided differences},
     journal = {Algebra i analiz},
     pages = {1--17},
     year = {2001},
     volume = {13},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2001_13_3_a0/}
}