1. Building Commissioning: What Can Denmark Learn from the U.S;Ágústsson;Experience?. Journal of. Performance of Constructed Facilities,2012
2. Blumberg, B.F., Cooper, D.R. & Schindler, P.S. (2014), Business Research Methods, McGraw Hill Education.
3. Costs and Benefits of Building Commissioning;Burnett;HKIE Transactions,2008
4. California Commissioning Collaborative . (2006), California Commissioning Guide: New Buildings. California Commissioning Colaborative . (CACx).
5. Creswell, J.W. (2013), Research design: Qualitative, quantitative, and mixed methods approaches, Sage publications.