1. Guidelines for Community Noise,2000
2. European Report No. 2173, November 9, 1996.
3. Swedish Environmental Protection Agency and Statistics Sweden 2000. Naturmiljön i siffror (in Swedish) The Natural Environment in Figures, 2000.
4. The National Board of Health and Welfare, Report on Health and Environment 2001, Modin Tryck Stockholm, January 2001, ISBN 91-7201-495-4.
5. SIKA Report 2002:1, Development of passenger transport, forecast for 2010, 2002 (in Swedish).