@article{Barmpalias2012CompactnessArgumentsEffectively,
  year      = 2010,
  publisher = {Oxford Univ. Press},
  volume    = {22},
  number    = {4},
  pages     = {679--691},
  author    = {G. Barmpalias},
  title     = {Compactness arguments with effectively closed sets for the study of relative randomness},
  journal   = {J. Log. Comput.},
}