1. The economics of conservation programs;Wirl,1997
2. The greenhouse effect;Brookes;Energy Policy,1990
3. Energy efficiency and economic fallacies;Grubb;Energy Policy,1990
4. Ljones A, Nesbakken R, Sandbakken S, Aaheim A. Household's energy use. The energy survey 1990. Report 92/2. Statistics Norway, 1992 [in Norwegian].
5. Mulgan G, Wilkinson H. Well-being and time. The time squeeze. Demos Quarterly, no. 5. London: Demos; 1995.