1. Asheim, B., & Gertler, M. (2006). The geography of innovation: Regional innovation systems. In J. Fagerberg, D. Mowery, & R. Nelson (Eds.), The Oxford handbook of innovation (pp. 291–317). Oxford: Oxford University Press.
2. Asheim, B. T., & Isaksen, A. (2002). Regional innovation systems: The integration of local ‘sticky’and global ‘ubiquitous’ knowledge. The Journal of Technology Transfer, 27(1), 77–86.
3. Borrás, S., & Edquist, C. (2013). The choice of innovation policy instruments. Technological Forecasting and Social Change, 80(8), 1513–1522.
4. Carayannis, E. G., & Campbell, D. (2012). Mode 3 knowledge production in quadruple helix innovation systems: 21st-century democracy, innovation, and entrepreneurship for development. New York: Springer.
5. Carayannis, E. G., & Rakhmatullin, R. (2014). The quadruple/quintuple innovation helixes and smart specialisation strategies for sustainable and inclusive growth in Europe and beyond. In Open innovation yearbook 2014. Luxembourg: European Union.