1. PMI: A Guide to the Project Management Body of Knowledge. PMBOK® Guide, vol. 6th edn. Project Management Institute, Pennsylvania (2017)
2. CMMI Product Team: CMMI for Development, Version 1.3. Software Engineering Institute, Carnegie Mellon University, Pittsburgh, Pennsylvania, Technical Report CMU/SEI-2010-TR-033 (2010).
http://resources.sei.cmu.edu/library/asset-view.cfm?AssetID=9661
3. The Standish Group International: Standish Group 2015 Chaos Report. The Standish Group International Inc., New York (2015)
4. TMForum: Revenue Assurance a survey pre-result blog: Lack of cross-functional mandate holds back change, say Revenue Assurance professionals (2015)
5. Acosta, K.: Aseguramiento de ingresos: una actividad fundamental en las empresas de telecomunicaciones. Revista Ingeniería Industrial 29(2), 1–6 (2008)