A. da Rocha, F. Lino, und J. Sampaio. IV Congresso Cubano de Ingenieria Mecânica, I Palestra Magistral, IV Congreso Cubano de Engenieria Mecânica, Cujae, La Habana, Cuba, (2006)
R. Cowan, und N. Zinovyeva. UNU-MERIT Working Paper Series, December. United Nations University, Maastricht Economic and social Research and training centre on Innovation and Technology, (2007)
A. Broström. Working Paper Series in Economics and Institutions of Innovation, Royal Institute of Technology, CESIS - Centre of Excellence for Science and Innovation Studies, (Juni 2008)
A. Broström, und H. Lööf. Working Paper Series in Economics and Institutions of Innovation, 131. Royal Institute of Technology, CESIS - Centre of Excellence for Science and Innovation Studies, (2008)
J. Arcade, M. Godet, F. Meunier, und F. Roubelat. Futures Research Methodology, American Council for the United Nations University: The Millennium Project, (1999)