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  1.  36
    A Basis Theorem for a Class of Two-Way Automata.D. L. Kreider & R. W. Ritchie - 1966 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 12 (1):243-255.
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  2.  12
    Predictably computable functionals and definition by recursion.D. L. Kreider & R. W. Ritchie - 1964 - Mathematical Logic Quarterly 10 (5):65-80.
  3.  40
    Predictably computable functionals and definition by recursion.D. L. Kreider & R. W. Ritchie - 1964 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 10 (5):65-80.