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This research was financially supported by the Russian Foundation for Basic Research (Grant 94-01-01497).
Translated fromSibirskii Matematicheskii Zhurnal, Vol. 37, No. 2, pp. 314–323, March–April, 1996.
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Kozlov, D.R. Existence of quadratic Lyapunov functionals for equations with unbounded operators in Hilbert space. Sib Math J 37, 268–275 (1996). https://doi.org/10.1007/BF02104872
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DOI: https://doi.org/10.1007/BF02104872