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Translated from Sibirskii Matematicheskii Zhurnal, Vol. 14, No. 4, pp. 738–758, July–August, 1973.
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Vladimirskii, Y.N. Compact perturbations of Φ-operators in locally convex spaces. Sib Math J 14, 511–524 (1973). https://doi.org/10.1007/BF00967546
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DOI: https://doi.org/10.1007/BF00967546