@article{Barmpalias2008RandomnessLownessDegrees,
  year      = 2008,
  publisher = {Cambridge Univ. Press},
  volume    = {73},
  number    = {02},
  pages     = {559--577},
  author    = {G. Barmpalias and A. E. M. Lewis and M. Soskova},
  title     = {Randomness, lowness and degrees },
  journal   = {J. Symb. Log.},
}