5Keeve P L, Gerhards U, Arnold W A, et al. Job requirements compared to dental school education: impact of a case-based learning curriculum[J]. GMS Z Med Ausbild, 2012,29(4) : 54.
6Nicholl T A, Lou K. A Model for Small-Group Problem-Based Learning in a Large Class Facilitated by One Instructor [J]. Am J Pharm Educ,2012,76(6) : 117.