1. R. G. G. Cattell, Editor, with contributions from T. Atwood, J. Duhl, G. Ferran, M. Loomis, and D. Wade: The Object Database Standard: ODMG-93, Morgan-Kaufmann, 1993, Revised 1994.
2. R. G. G. Cattell and J. Skeen, “An Engineering Database Benchmark”, ACM Transactions on Database Systems, April 1992.
3. R. G. G. Cattell, Object Data Management, Addison-Wesley, 1991, revised 1994 (covers two dozen systems in some detail, plus an annotated bibliography of other sources).
4. M. Loomis, Object Databases: The Essentials, Addison-Wesley, 1994 (provides good introductory discussion of object-oriented DBMSs, with contrasts to the object relational approach).
5. ODMG: Automated response providing the most up-to-date status and contacts for ODMG can be obtained by sending an empty email message to info@odmg.org.