@article{1364879,
      note = {Originally presented as the author's thesis, University of  California, Berkeley.},
      author = {Epstein, Richard L.,},
      url = {http://library.usi.edu/record/1364879},
      title = {Minimal degrees of unsolvability and the full  approximation construction /},
      recid = {1364879},
      pages = {1 online resource (147 pages) :},
}