Literature Cited
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Additional information
Voronezh Military Aviation Engineering Academy. Translated from Funktsional'nyi Analiz i Ego Prilozheniya, Vol. 22, No. 1, pp. 62–63, January–March, 1988.
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Gershtein, L.M. Perturbation of the generating operator of an analytic semigroup. Funct Anal Its Appl 22, 51–52 (1988). https://doi.org/10.1007/BF01077724
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DOI: https://doi.org/10.1007/BF01077724