StarPlan II: Evolution of an Expert System. - Ronald Siemmens; Marilyn Golden; Jay C. Ferguson (AAAI, 1986)

Episodic Skeletal-Plan Refinement Based on Temporal Data. - Samson W. Tu; Michael G. Kahn; Mark A. Musen; Jay C. Ferguson; Edward H. Shortliffe; Lawrence M. Fagan (Commun. ACM, 1989)