Combining Object-Oriented and Relational Models of Data. - R. G. G. Cattell; T. R. Rogers (OODBS, 1986)

Entity-Relationship Database User Interfaces. - T. R. Rogers; R. G. G. Cattell (ER, 1987)

Entity-Relationship Database User Interface. - T. R. Rogers; R. G. G. Cattell (IEEE Data Eng. Bull., 1988)