MathSciNet bibliographic data MR2434027 (2010d:03057) 03D05 (03B25 05A05 68Q42 68Q45 68R15) Bárány, Vince A hierarchy of automatic $\omega$$\omega$-words having a decidable MSO theory. Theor. Inform. Appl. 42 (2008), no. 3, 417–450. Article

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