1. AER, 1999. Renewable Energy Advice.The Hague, ISBN 90 74357 23 7, March 1999 (in Dutch).
2. CBS, Stat-Online.
3. Crone, motion MP, 1998/1999. Parliamentary Papers II, 26 303 No. 55.
4. Dinica, V., 2002. Sustained diffusion of renewable energy—politically defined investment contexts for the diffusion of renewable electricity technologies in Spain, the Netherlands and United Kingdom, Ph.D. Thesis, CSTM, University of Twente.
5. ECN, 2002. Liberalisation of the Green Energy Market, Chapter 10 (in Dutch).