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@article{DAN_1991_321_5_a0, author = {V. D. Budaev}, title = {A necessary condition for the {Riesz} basis property of systems of}, journal = {Doklady Akademii Nauk}, pages = {873--875}, publisher = {mathdoc}, volume = {321}, number = {5}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1991_321_5_a0/} }
V. D. Budaev. A necessary condition for the Riesz basis property of systems of. Doklady Akademii Nauk, Tome 321 (1991) no. 5, pp. 873-875. http://geodesic.mathdoc.fr/item/DAN_1991_321_5_a0/