1. EN 832:1998 — Thermal Performance of Buildings — Calculation of Energy Use for Heating — Residential Buildings, CEN, Brussels, Belgium, 1998.
2. S. Aggerholm et al., SBI-direction 184: Energy Demand in Buildings (In Danish, with an English summary), Danish Building Research Institute, Hørsholm, Denmark, 1995.
3. K. Grau, S. Aggerholm, Building's Heating Demand 95 — Pc-Programme for Calculation of Heating Demand and Energy Frame — User's Guide (In Danish), Danish Building Research Institute, Hørsholm, Denmark, 1995.