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2. U.S. National parks and management of park soundscapes: A review.;Miller;Appl. Acoust.,2008
3. Ruimte, Rust, en Stilte, Beleving Door Burgers en Indicaties Voorbeheer en Beleid (Space, Tranquillity and Quietness, Perception by Citizens and Indications for Management and Policy) (in Dutch); Alterra Report 423;Coeterier,2001
4. European Noise Directive 2002/49/EC of the European Parliament and of the Council, of 25 June 2002, relating to the assessment and management of environmental noise;Off. J. Eur. Communities,2002