7Schmidt HG, Dauphinee WD, Patel VL. Comparing the effects of problem-based and conventional curricula in an international sample [J]. J Med. Educ,1987,62:305-315.
8Choi. H. The effects of PBL (Problem-Based Learning)on the metacognition, critical thinking, and problem solving process of nursing students[J]. Taehan Kanho Hakhoe Chi. 2004 Aug: 34 (5):712-721.