1. Querying semistructured data;Abiteboul,1997
2. Querying and updating the file;Abiteboul,1993
3. Correspondence and translation for heterogeneous data;Abiteboul,1997
4. The Theory of Parsing, Translationand Compiling, Vol 1: Parsing;Aho,1972
5. Shortening the OED: experience with a grammar-defined database;Blake;ACM Transactions on Information Systems,1992