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Liu, Guangwu; Martin-Vide, Carlos; Salomaa, Arto; Yu, Sheng State complexity of basic language operations combined with reversal. (English) Zbl 1154.68073 Inf. Comput. 206, No. 9-10, 1178-1186 (2008). MSC: 68Q45 PDFBibTeX XMLCite \textit{G. Liu} et al., Inf. Comput. 206, No. 9--10, 1178--1186 (2008; Zbl 1154.68073) Full Text: DOI