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2. Dong G, Pang C. Maintaining transitive closure in first-order after node-set and edge-set deletions. Inf Process Lett. 1997;62(3):193–9.
3. Dong G, Su J. Incremental and decremental evaluation of transitive closure by first-order queries. Inf Comput. 1995;120(1):101–6.
4. Dong G, Su J. Arity bounds in first-order incremental evaluation and definition of polynomial time database queries. J Comput Syst Sci. 1998;57(3):289–308. Preliminary version in the proceedings of the ACM symposium on principles of database systems, 1995.
5. Dong G, Su J. Incremental maintenance of recursive views using relational calculus/SQL. ACM SIGMOD Rec. 2000;29(1):44–51.