Ash, C. J.; Jockusch, C. G. jun.; Knight, J. F. Jumps of orderings. (English) Zbl 0705.03022 Trans. Am. Math. Soc. 319, No. 2, 573-599 (1990). Reviewer: C.Calude MSC: 03D45 03D25 PDFBibTeX XMLCite \textit{C. J. Ash} et al., Trans. Am. Math. Soc. 319, No. 2, 573--599 (1990; Zbl 0705.03022) Full Text: DOI
Ash, C. J. Recursive labelling systems and stability of recursive structures in hyperarithmetical degrees. (English) Zbl 0631.03017 Trans. Am. Math. Soc. 298, 497-514 (1986). Reviewer: O.V.Belegradek MSC: 03C57 03D45 PDFBibTeX XMLCite \textit{C. J. Ash}, Trans. Am. Math. Soc. 298, 497--514 (1986; Zbl 0631.03017) Full Text: DOI