1. Becker, B. J. (1996). The generalizability of empirical research results. In C. P. Benbow & D. Lubinski (Eds.), Intellectual talent: Psychometric and social issues (pp. 362–383). Baltimore, MD: Johns Hopkins Press.
2. Burchett, H., Umoquit, M., & Dobrow, M. (2011). How do we know when research from one setting can be useful in another? A review of external validity, applicability and transferability frameworks. Journal of Health Services Research and Policy, 16, 238–244.
https://doi.org/10.1258/jhsrp.2011.010124
3. Campbell, D., & Stanley, J. (1963). Experimental and quasi-experimental designs for research. Chicago, IL: Rand-McNally.
4. Campbell, D. T. (1986). Relabeling internal and external validity for applied social scientists. New Directions for Program Evaluation, 31, 67–77.
https://doi.org/10.1002/ev.1434
5. Chandler, J., Churchill, R., Higgins, J. P. T., Lasserson, T., & Tovey, D. (2013). Methodological Expectations of Cochrane Intervention Reviews (MECIR). Methodological standards for the conduct of new Cochrane Intervention Reviews.