@inbook{17987,
  author       = {{Meer, Klaus and Ziegler, Martin}},
  booktitle    = {{Logical Approaches to Computational Barriers}},
  isbn         = {{9783540354666}},
  issn         = {{0302-9743}},
  title        = {{{Uncomputability Below the Real Halting Problem}}},
  doi          = {{10.1007/11780342_39}},
  year         = {{2006}},
}