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)

Persistent Java Objects in 3 Tier Architectures. - Robert Bretl; Allen Otis; Marc San Soucie; Bruce Schuchardt; R. Venkatesh (POS/PJW, 1998)

Reduced-Conflict Objects. - Jay Almarode; Robert Bretl (J. Object Oriented Program., 1998)