1. Lecture Notes in Macroeconomics;C Groth,2015
2. OECD. Oslo Manual; 2005. http://dx.doi.org/10.1787/9789264013100-en.
3. The theory of economic development;JA Schumpeter,1934
4. Innovation, what innovation? A comparison between product, process and organisational innovation;H Boer;International Journal of Technology Management,2001
5. Nakamoto S. Bitcoin: A Peer-to-Peer Electronic Cash System. 2009. https://bitcoin.org/bitcoin.pdf.