1. A normal form for XML documents;Arenas;ACM Trans. Database Syst.,2004
2. Reasoning about keys for XML;Buneman;Inf. Syst.,2003
3. Patrick Carey, New Perspective on XML-Comprehensive, Course Technology, 2004.
4. Sven Hartmann, Sebastian Link, More functional dependencies for XML, in: ADBIS, vol. 2798, Lecture Notes in Computer Science, 2003, pp. 355–369.
5. Sven Hartmann, Sebastian Link, Multi-valued dependencies in the presence of lists, in: PODS, 2004, pp. 330–341.