1. Machine Learning with the Cyc Knowledge Base, Technical Report ACT-CYC-224-90, MCC, 1990.
2. “Integrated learning with incorrect and incomplete theories,” In The Proceedings of the 5th International Machine Learning Workshop, Ann Arbor, MI, 1988.
3. and , “Multi-strategy learning in nonhomogeneous domain theories,” In The Proceedings of the 6th International Machine Learning Workshop, Cornell University, 1989.