1. The National Property Board How to plan and maintenance high quality premises (Hur bra hus blir till och förvaltas) Berling Skogs AB, Trelleborg, Sweden (2000) (in Swedish)
2. The Royal Swedish Academy of Engineering Sciences, http://www.iva.se (2003)
3. The Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS), http://www.formas.se (2003)
4. TNC Construction economical concepts (Byggekonomiska termer) Tekniska nomenklaturcentralens publikationer, Stockholm, Sweden (2000) (in Swedish)
5. Hertzell, T Building Documents 90 (Bygghandlingar 90: byggsektorns rekommendationer för redovisning av byggprojekt) SIS: Swedish Standards Institute, Solna, Sweden (1992) (in Swedish)