1. Ademe, 2003. Odysee Energy Efficiency Indicators. 〈www.odysee.org〉.
2. Akkermans, H., Healey, D., Ottosson, H., 1998. The transmission of data over the electric power lines. Report to the European Commission Task Contract No. 116503.
3. Energy-efficient motor systems in the industrial and in the services sectors in the European Union: characterization, potentials, barriers and policies;Almeida;Energy,2003
4. Bertoldi, P., 2005. The Kyoto Protocol: The role and potential of end-use energy and the recommended actions. Presented at the UNECE Meeting for the Implementation of the Kyoto Protocol, Energy Efficiency and Climate Change Mitigation, Geneva.
5. Bjelland, E., Krisoffersen, T., 2005. Intelligent street lighting in Oslo, Norway. Paper 067, Proceedings of the Sixth International Conference on Energy Efficient Lighting, Shanghai, China.