@article{ZNSL_1983_127_a11,
     author = {M. A. Shubova},
     title = {On the proximity of the {Riesz} basises to the ortonormed basises in {Hilbert} space},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {201--208},
     publisher = {mathdoc},
     volume = {127},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_127_a11/}
}