Abstraction Mechanisms in CLU. - Barbara H. Liskov; Alan Snyder; Russell R. Atkinson; Craig Schaffert (Commun. ACM, 1977)

CLU Reference Manual - Barbara Liskov; Russell R. Atkinson; Toby Bloom; J. Eliot B. Moss; Craig Schaffert; Robert Scheifler; Alan Snyder (Springer, 1981)

Persistent and Shared Objects in Trellis/Owl. - Patrick O'Brien; Bruce Bullis; Craig Schaffert (OODBS, 1986)

An Introduction to Trellis/Owl. - Craig Schaffert; Topher Cooper; Bruce Bullis; Mike Killian; Carrie Wilpolt (OOPSLA, 1986)

Proposal for a Language Compatible Arithmetic Standard. - Mary Payne; Craig Schaffert; Brian A. Wichmann (ACM SIGPLAN Notices, 1990)

An Object-Oriented Database for Trellis. - Patrick O'Brien; Bruce Bullis; Craig Schaffert (On Object-Oriented Database System, 1991)