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  1.  4
    The Use of Lists in the Study of Undecidable Problems in Automata Theory.J. Hartmanis & F. D. Lewis - 1974 - Journal of Symbolic Logic 39 (2):347-347.
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  2.  15
    Classes of Recursive Functions and Their Index Sets.F. D. Lewis - 1971 - Mathematical Logic Quarterly 17 (1):291-294.
  3.  28
    Classes of Recursive Functions and Their Index Sets.F. D. Lewis - 1971 - Mathematical Logic Quarterly 17 (1):291-294.
  4.  2
    The Enumerability and Invariance of Complexity Classes.F. D. Lewis - 1974 - Journal of Symbolic Logic 39 (2):349-349.