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  1. Theory of Recursive Functions and Effective Computability.Hartley Rogers - 1971 - Journal of Symbolic Logic 36 (1):141-146.
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  • (1 other version)On deterministic normal systems.Paul Axt & W. E. Singletary - 1969 - Mathematical Logic Quarterly 15 (4‐5):49-62.
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  • (1 other version)On deterministic normal systems.Paul Axt & W. E. Singletary - 1969 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 15 (4-5):49-62.
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  • (2 other versions)Machine Configuration and Word Problems of Given Degree of Unsolvability.J. C. Shepherdson - 1965 - Mathematical Logic Quarterly 11 (2):149-175.
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  • (2 other versions)Machine Configuration and Word Problems of Given Degree of Unsolvability.J. C. Shepherdson - 1965 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 11 (2):149-175.
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  • Quantificational variants on the halting problem for turing machines.Patrick C. Fischer - 1969 - Mathematical Logic Quarterly 15 (13-15):211-218.
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