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Publication:3940870
zbMath0482.68076MaRDI QIDQ3940870
Publication date: 1978
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Trees (05C05) Formal languages and automata (68Q45) Graph theory (including graph drawing) in computer science (68R10) Recursively (computably) enumerable sets and degrees (03D25)
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