Degrees of Unsolvability

Klaus Ambos-Spies, Peter A. Fejer. Degrees of Unsolvability. In Jörg H. Siekmann, editor, Computational Logic. Volume 9 of Handbook of the History of Logic, pages 443-494, Elsevier, 2014. [doi]

@incollection{Ambos-SpiesF14,
  title = {Degrees of Unsolvability},
  author = {Klaus Ambos-Spies and Peter A. Fejer},
  year = {2014},
  doi = {10.1016/B978-0-444-51624-4.50010-1},
  url = {http://dx.doi.org/10.1016/B978-0-444-51624-4.50010-1},
  researchr = {https://researchr.org/publication/Ambos-SpiesF14},
  cites = {0},
  citedby = {0},
  pages = {443-494},
  booktitle = {Computational Logic},
  editor = {Jörg H. Siekmann},
  volume = {9},
  series = {Handbook of the History of Logic},
  publisher = {Elsevier},
  isbn = {978-0-444-51624-4},
}