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@article{DAN_1986_291_6_a1, author = {V. A. Il'in}, title = {An inequality of {Hilbert} type for a system of eigenfunctions of}, journal = {Doklady Akademii Nauk}, pages = {1292--1296}, publisher = {mathdoc}, volume = {291}, number = {6}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1986_291_6_a1/} }
V. A. Il'in. An inequality of Hilbert type for a system of eigenfunctions of. Doklady Akademii Nauk, Tome 291 (1986) no. 6, pp. 1292-1296. http://geodesic.mathdoc.fr/item/DAN_1986_291_6_a1/