@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" }