1. Can “realist” randomised controlled trials be genuinely realist?;Belle;Trials,2016
2. Fidelity of implementation: Is it the right concept?;Bryk,2016
3. Experimental and quasi-experimental designs for research;Campbell,1963
4. Practical program evaluation: Assessing and improving planning, implementation;Chen,2005
5. The bottom-up approach to integrative validity: A new perspective for program evaluation;Chen;Evaluation and Program Planning,2010