1. M. Arm, personal communication, October 1998, Swedish National Road and Transport Research Institute; K. Ludvigsen, personal communication, October 1998, RGS90, Copenhagen.
2. BÅ 99. Återvunna byggnadsmateroial (Recycled building materials). Complement to the Board's Manual on Concrete structures, BBK 94. Karlskrona, Sweden: National Board of Housing, Building and Planning, 1999 [in Swedish].
3. BBR. Boverkets byggregler (Building and design regulations). Karlskrona, Sweden: National Board of Housing, Building and Planning, 1994 [in Swedish].
4. BKR. Boverkets konstruktionsregler (Building and construction regulations). Karlskrona, Sweden: National Board of Housing, Building and Planning, 1999 [in Swedish].
5. Å. Hagelin, personal communication, March 2000, Svenska Renhållningsverksföreningen (The Swedish Association of Waste Management).