1. Energy Policies of IEA Countries: 1990 Review;International Energy Agency,1991
2. Energy Balances of OECD Countries: 1980–1989;International Energy Agency,1991
3. Combined heat and power and district heating — rationale, role and realisation;Brady,1988
4. Technological developments in CHP/DH;Andreas,1988
5. Energy Efficiency and the Environment: Options and Policies;International Energy Agency,1991