1. Elmasri, R., Li, Q., Fu, J., Wu, Y.C., Hojabri, B., Ande, S.: Conceptual modeling for customized XML schemas. Data and Knowledge Engineering 54(1), 57–76 (2005)
2. Gubiani, D., Montanari, A.: ChronoGeoGraph: an expressive spatio-temporal conceptual model. In: SEBD, pp. 160–171 (2007),
http://dbms.dimi.uniud.it/cgg/
3. Elmasri, R., Navathe, S.B.: Fundamentals of Database Systems, 5th edn. Addison-Wesley, Reading (2007)
4. Liu, C., Vincent, M.W., Liu, J.: Constraint preserving transformation from relational schema to XML Schema. World Wide Web 9(1), 93–110 (2006)
5. Cormen, T.H., Stein, C., Rivest, R.L., Leiserson, C.E.: Introduction to Algorithms. McGraw-Hill Higher Education, New York (2001)