@InProceedings{tapd98_diaz,
  author =       "V. Díaz, V. Carrillo, and  M. Toro",
  title =        "Elementary Tree Representation",
  booktitle =    "Proceedings of Tabulation in Parsing and Deduction (TAPD'98)",
  year =         1998,
  pages =        "10--15",
  address =      "Paris (FRANCE)",
  month =        April,
  url =          "ftp://ftp.inria.fr/INRIA/Projects/Atoll/TAPD98/diaz.ps.gz"
}