@string{tcs = {Theoretical Computer Science}}

@Article{Kou93,
  author =       {E. Koutsoupias},
  title =        {Improvements on {K}hrapchenko's theorem},
  journal =      tcs,
  year =         1993,
  month =        aug,
  volume =       116,
  number =       2,
  pages =        {399--403}
}