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  1. Stability of recursive structures in arithmetical degrees.C. J. Ash - 1986 - Annals of Pure and Applied Logic 32:113-135.
  • Categoricity in hyperarithmetical degrees.C. J. Ash - 1987 - Annals of Pure and Applied Logic 34 (1):1-14.
  • A metatheorem for constructions by finitely many workers.J. F. Knight - 1990 - Journal of Symbolic Logic 55 (2):787-804.
  • An introduction to recursively saturated and resplendent models.Jon Barwise & John Schlipf - 1976 - Journal of Symbolic Logic 41 (2):531-536.