1. Au, I.: Feasibility Study of Query Translation between SQL and XQL, M.Sc. dissertation of C.S. Department at City University of Hong Kong (2002)
2. Shanmugasundaram, J., et al.: RDBs for Querying XML Documents: Limitations and Opportunities. In: 25th VLDB Conference, pp. 302–314 (1999)
3. Florescu, D., Kossman, D.: Storing and Querying XML Data Using an RDBMS. IEEE Data Engineering Bulletin 22(3), 27–34 (1999)
4. Collins, S.R., et al.: XML Schema Mappings for Heterogeneous Database Access. Information and Software Technology 44(4), 251–257 (2002)
5. Tatarinov, I., et al.: Storing and Querying Ordered XML Using a RDB System. In: 2002 ACM SIGMOD int’l conference on Management of data (June 2002)