AM last page: A guide to research paradigms relevant to medical education - Bergman, E; de Feijter, J; Frambach, J; Godefrooij, M; Slootweg, I; Stalmeijer, R; van der Zwet, J (Acad Med, 2012)
doi: 10.1097/ACM.0b013e31824fbc8a.