1. and (1984). ‘Optimization of building construction with respect to life-cycle costs’, 3rd Int'l Symp. on Building Economics, Ottawa, C1B-84.
2. Different pricelists from dealers of heating equipment, e.g. ‘Rörgrossisternas prislista’ (In Swedish).
3. et al. (1985). ‘From natural to mechanical exhaust ventilation with heat pump’, Report M85, 1, Swedish Institute for Building Research.
4. and (1985). ‘Differential rates for district heating—an analyse of the consequences for retrofits in multi-family houses’. Report LiTH-1KP-R-412, Institute of Technology, Linköping, Sweden (In Swedish).