@article{TM_2008_260_a3,
     author = {S. V. Bochkarev},
     title = {A {Generalization} of {Kolmogorov's} {Theorem} to {Biorthogonal} {Systems}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {44--56},
     publisher = {mathdoc},
     volume = {260},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2008_260_a3/}
}