1. European Investment Bank (2019) The future of the European Space Sector—how to leverage Europe’s technological leadership and boost investments for space ventures, 2019, p 5
2. ORBIT Intelligence–Questel https://www.orbit.com/
3. ESA Technology Tree Version 3.0 (2013) ESA Communications-ESA STM-277 V.3
4. ASI contract n. I/006/10/0 (2010) nanotechnologies in space transport systems, 2010
5. Graziola G, Cefis E, Gritti P (2011) "L'industria spaziale italiana nel contesto europeo - i rendimenti degli investimenti in alta tecnologia" - Il Mulino, 2011, pp 211–213 (ISBN 978-88-15-15013-4)