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Published in Russian in Doklady Akademii Nauk, 2007, Vol. 413, No. 6, pp. 727–729.
The article was translated by the author.
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Ikramov, K.D. Unitary congruences and theorems on concommuting matrices. Dokl. Math. 75, 307–309 (2007). https://doi.org/10.1134/S1064562407020342
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DOI: https://doi.org/10.1134/S1064562407020342