1. Project maturity in organisations;Andersen;International Journal of Project Management,2003
2. Project Management Maturity Model,2013
3. Foundations of the Prado-PM maturity model;Archibald;PM World Journal,2014
4. Organizational Project Management Maturity Model (OPM3®),2013
5. Axelos, 2017. Managing Successful Projects with PRINCE2. Stationery Office. https://books.google.pt/books?id=oE2dtAEACAAJ