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@article{TM_1981_157_a5, author = {B. S. Kashin and S. V. Konyagin}, title = {Systems of vectors in {Hilbert} space}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {64--67}, publisher = {mathdoc}, volume = {157}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1981_157_a5/} }
B. S. Kashin; S. V. Konyagin. Systems of vectors in Hilbert space. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Number theory, mathematical analysis, and their applications, Tome 157 (1981), pp. 64-67. http://geodesic.mathdoc.fr/item/TM_1981_157_a5/