@article{Barmpalias2010ElementaryDifferencesBetween,
  year      = 2010,
  publisher = {Elsevier},
  volume    = {161},
  number    = {7},
  pages     = {923--934},
  author    = {G. Barmpalias},
  title     = {Elementary differences between the degrees of unsolvability and degrees of compressibility},
  journal   = {Ann. Pure Appl. Logic},
}