1. Miyamoto, M., Straightjacket Society. Kodansha International, Tokyo, Japan, 1994.
2. Naff, C., About Face: How I Stumbled Onto Japan's Social Revolution. Kodansha International, Tokyo, Japan, 1996.
3. Warren, A., Model contracts for third party financing, in Proceedings of Investing in Energy Efficiency: The Role of Third Party Financing, 28–29 Oct. 1993. International Energy Agency, Paris, France, 1993, pp. 41–54.
4. Fee, D., Third party financing in the EC, in Proceedings of Investing in Energy Efficiency: The Role of Third Party Financing, 28–29 Oct 1993. International Energy Agency, Paris, France, 1993, pp. 31–38.