@string{ACTA   = "Acta Informatica"}

@Article{BP03,
  author =       "Amir M. Ben-Amram and Omer Berkman and Holger Petersen",
  title =        "Element Distinctness on One-Tape Turing Machines"
  journal =      ACTA,
  volume =       "40",
  number =       "2",
  year =         "2003",
  pages =        "81--94"
}