1. An experiment with learning contracts;Barlow;Journal of Higher Education,1974
2. Gaps and contracts;Donovan;Nursing Outlook,1981
3. Medical student research: a program of self education;Fisher;Journal of Medical Education,1981
4. Fox, R.D. (1981) Certifying Physicians' Self-Directed Learning. Paper presented at Society of Medical College Directors of Continuing Medical Education, Washington, D.C.