Object-Oriented Queries: Equivalence and Optimization. - Gail M. Shaw; Stanley B. Zdonik (DOOD, 1989)

An Object-Oriented Query Algebra. - Gail M. Shaw; Stanley B. Zdonik (IEEE Data Eng. Bull., 1989)

A Query Algebra for Object-Oriented Databases. - Gail M. Shaw; Stanley B. Zdonik (ICDE, 1990)

By the C - Introduction. - Gail M. Shaw (POS, 1990)