@article{Barmpalias2005HypersimplicitySemicomputabilityWeak,
  year      = 2005,
  publisher = {Springer},
  volume    = {44},
  number    = {8},
  pages     = {1045--1065},
  author    = {G. Barmpalias},
  title     = {Hypersimplicity and semicomputability in the weak truth table degrees},
  journal   = {Arch. Math. Logic},
}