1. Faulkner A, Mills N, Bainton D, Baxter K, Kinnersley P, Peters TJ, Sharp D: A systematic review of the effect of primary care-based service innovations on quality and patterns of referral to specialist secondary care. Brit J Gen Pract. 2003, 53: 878-884.
2. Weiss CH: Nothing as practical as a good theory: exploring theory-based evaluation for comprehensive community initiatives for children and families. New Approaches to Evaluating Community Initiatives. Edited by: Connell JP, Kubisch AC, Schoor LB, Weiss CH. 1995, Washington DC: Aspen Institute, 65-69.
3. Plsek PE, Greenhalgh T: The challenge of complexity in healthcare. BMJ. 2001, 323: 625-628. 10.1136/bmj.323.7313.625.
4. Miles A: Complexity in medicine and healthcare: people and systems, theory and practice. J Eval Clin Pract. 2009, 15: 409-410. 10.1111/j.1365-2753.2009.01204.x.
5. Pawson R: Evidence-based policy: the promise of realist synthesis. Evaluation. 2002, 8: 340-358. 10.1177/135638902401462448.