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Additional information
Translated from Sibirskii Matematicheskii Zhurnal, Vol. 16, No. 3, pp. 562–571, May–June, 1975.
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Nudel'man, A.A., Shvartsman, P.A. On the existence of solutions of certain operator inequalities. Sib Math J 16, 431–439 (1975). https://doi.org/10.1007/BF00967534
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DOI: https://doi.org/10.1007/BF00967534