Compact perturbations of normal operators in a Krein space
English version (Springer): Ukrainian Mathematical Journal 42 (1990), no. 10, pp 1155-1161.
Citation Example: Azizov T. Ya., Ionas P. Compact perturbations of normal operators in a Krein space // Ukr. Mat. Zh. - 1990. - 42, № 10. - pp. 1299–1306.
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