Starting a Knowledge Engineering Project: A Step-By-Step Approach. - Michael J. Freiling; James H. Alexander; Steven Messick; Steven Rehfuss; Sheryl Shulman (AI Mag., 1985)

Knowledge Level Engineering Ontological Analysis. - James H. Alexander; Michael J. Freiling; Sheryl Shulman; Jeffery Staley; Steven Rehfuss; Steven Messick (AAAI, 1986)

Ontological Analysis: An Ongoing Experiment. - James H. Alexander; Michael J. Freiling; Sheryl Shulman; Steven Rehfuss; Steven Messick (Int. J. Man Mach. Stud., 1987)

Representing CSG Solids Using a Logic-Based Object Data Model. - T. Lougenia Anderson; Hitomi Ohkawa; Jack Gjovaag; David Maier 001; Sheryl Shulman (VDB, 1989)