Class Modification in the GemStone Object-Oriented DBMS. - D. Jason Penney; Jacob Stein (OOPSLA, 1987)

Is the Disk Half Full or Half Empty? Combining Optimistic and Pessimistic Concurrency Mechanisms in a Shared, Persistent Object Base - D. Jason Penney; Jacob Stein; David Maier 001 (POS, 1987)

The GemStone Data Management System. - Robert Bretl; David Maier 001; Allen Otis; D. Jason Penney; Bruce Schuchardt; Jacob Stein; E. Harold Williams; Monty Williams (Object-Oriented Concepts, Databases, and Applications, 1989)