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Translated from Kibernetika i Sistemnyi Analiz, No. 3, pp. 7–22, May–June, 1997.
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Lisovik, L.P. Finitely many-valued regular events in a direct product of semigroups. Cybern Syst Anal 33, 310–319 (1997). https://doi.org/10.1007/BF02733064
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DOI: https://doi.org/10.1007/BF02733064