1. ESA, The Future of European Space Exploration: Towards a Long-Term Strategy, HME-HS/REF/MEM/BH/2005-50001, December 2005.
2. ESA, High-Level Architecture Requirements for European Space Exploration, HSF-EA/HSP/RQ/OM/2009-05003, December 2009.
3. ISECG, The Global Exploration Roadmap, September 2011.
4. M.A. Perino, F. Fenoglio, J. Apeldoorn, O. Mongrard, B. Hufenbach, Potential European Contributions for Human Space Exploration, IAC-11.D3.1.5, Cape Town, South Africa, October 3–7 2011.
5. M.A. Perino. F. Fenoglio. S. Pelle, B. Hufenbach, Strategic European Contributions to International Exploration Missions, GLEX 2012–12673, Global Space Exploration Congress, Washington, DC, USA, May 21–25 2012.