3Lake E,Chambers D W.Effects of posting examinations and answer keys on students' study methods and test performance[J].J Dent Educ,2009,73(5):601-613.
4Ryan D P,Marlow B.Build-a-case:a brand new continuing medical education technique that is peculiarly familiar[J].J Contin Educ Health Prof,2004,24(2):112-118.