@article{Barmpalias2013UniversalComputablyEnumerable,
  author            = {G. Barmpalias},
  journal           = {Inf. Comput.},
  pages             = {41--59},
  title             = {Universal computably enumerable sets and initial segment prefix-free complexity},
  volume            = {233},
  year              = {2013},
  publicationstatus = {published},
}