1. Self-directed learning: a guide for learners and teachers;Knowles, M.,1975
2. Tomorrow's doctors;Council, General Medical,1993
3. Problem-based learning: rationale and description;Schmidt, H.G.;Med Educ,1983
4. The challenge ofproblem-based learning;Boud, D.,1991
5. A taxonomy of problem-based learning;Barrows, H.S.;Med Educ,1986