1. Indexing techniques for queries on nested objects
2. Index organizations for object-oriented database systems
3. The generalized index model for object-oriented database systems. In Proc 10th Phoenix Conf on Computer and Communication, 1991. pp 302-308.
4. On the selection of optimal index configuration in OO databases. In: Proc 10th Intl Conf on Data Engineering, 1994. pp 526-537.
5. Short cuts for traversals in object-oriented database systems. Proc Intl Computer Symposium, 1994. pp 1172-1177.