1. Comparison of medical care on nurse clinician and physician clinics in medical school affiliated hospitals;Bessman;Journal of Chronic Disease,1973
2. Roles, goals and value structures in organizations;Biddle,1964
3. Role theory expectations, identities, and behaviors;Biddle,1979
4. Role theory,1966
5. The extinction of the nurse practitioner: Threat of reality?;Billingsley;Nurse Practitioner,1982