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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 41, No. 10, pp. 1388–1391, October, 1989.
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Spitkovskii, I.M. Factorization of hermitian matrix-valued functions and classification of shifts in a space with indefinite metric. Ukr Math J 41, 1195–1197 (1989). https://doi.org/10.1007/BF01057261
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DOI: https://doi.org/10.1007/BF01057261