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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 41, No. 6, pp. 789–794, June, 1989.
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Storozh, O.G. Accretive operators related to a positive-definite operator. Ukr Math J 41, 677–681 (1989). https://doi.org/10.1007/BF01060568
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DOI: https://doi.org/10.1007/BF01060568