6Jonassen, David H,Shen, Demei,Marra, Rose M,Cho, Young-Hoan,Lo, Jenny L,Lohani, Vinod K.Engaging and Supporting Problem Solving in Engineering Ethics[J].Journal of Engineering Education.2009(3)
4Allen D E,Donham R S,Bernhardt S A.2011.Prob- lem-based learning.New Directions for Teaching and Learn- ing,2011 (128) :21-29.
5Scbmidt H G,Rotgans J I,Yew E H J.2011.The process of problem-based learning:what works and why.Medical educa- tion, 45 (8) : 792-806.
6Khoshnevisasl P, Sadeghzadeh M, Mazloomzadeh S, et al. Comparison of problem-based learning with lecture-based learning [J]. lran Red Crescent Med J, 2014, 16(5): e5186.
7Savery JR. Overview of problem-based learning: definitions and distinctions [J]. Interdisciplinary Journal of Problem-based Learning, 2006, l(1): 9-20.
8Frick E. Teaching somatoform disorders in a "nervous system and behaviour" course: the opportunities and limitations of problem -based learning[J]. Educ Health(Abingdon), 2005, 18(2): 246-255.
9Bizzoechi J, Schell R. Rich-narrative case study for online PBL in medical education[J]. Aead Med, 2009, 84(10): 1412-1418.
