Constraint Management in Expert Database Systems. - Allan Shepherd; Larry Kerschberg (Expert Database Workshop, 1984)

PRISM: A Knowledge Based System for Semantic Integrity Specification and Enforcement in Database Systems. - Allan Shepherd; Larry Kerschberg (SIGMOD Conference, 1984)

Strudel - An Extensible Electronic Conversation Toolkit. - Allan Shepherd; Niels Mayer; Allan Kuchinsky (CSCW, 1990)