1. What is value in health care?;Porter;N Engl J Med.,2010
2. Gray M. Transforming healthcare [documento electrónico] 2012. [consultado 21 de Enero 2016] Disponible en http://www.kingsfund.org.uk/sites/files/kf/sir-muir-gray-transforming-health-care-sustainable-future%E2%80%93challenge-kingsfund-nov12.pdf
3. European Commission. Research and Innovation performance in Spain. Country Profile [documento electrónico] 2013. [consultado 17 Ago 2015]. Disponible en http://ec.europa.eu/research/innovation-union/pdf/state-of-the-union/2012/countries/spain_2013.pdf
4. Has medical history importance for surgeons?;Wangensteen;Surg Gynecol Obstet.,1975
5. Surgical Innovation;DeJong;British J Surg,2015