1. The OPERA Model. Optimal Energy Retrofits in Multi-Family Residences;Gustafsson,1988
2. A Methodology for Developing a Retrofit Strategy for Existing Single-Family Residences;Hall,1984
3. CIRA Economic Optimization Methodology;Sonderegger,1983
4. The MSA-method;Nilson,1985
5. Optimization investment levels for energy conservation;Rabl,1985