1. F. Bancilhon, G. Barbedette, V. Benzaken, C. Delobel, S. Gamerman, C. Lecluse, P. Pfeffer, P. Richard and F. Velez. The design and implementation of O2, an object-oriented database system, in [12].
2. CLASSIC: a structural data model for objects;Borgida,1989
3. A query language for the O2 object-oriented database system;Bancilhon,1989
4. The O2 query language syntax and semantics;Bancilhon;Altair Technical Report Number 45-90,1990
5. Data model issues for object-oriented applications;Banerjee;ACM Trans. Office Inform. Systems,1987