1. W. Alberts. 2015. Traffic Noise and Motorway Pavements Geneva Switzerland. W. Alberts. 2015. Traffic Noise and Motorway Pavements Geneva Switzerland.
2. F. Alton Everest and K. Pohlmann. 2009. Master Handbook of Acoustics 5th ed. T. Electronics. F. Alton Everest and K. Pohlmann. 2009. Master Handbook of Acoustics 5th ed. T. Electronics.
3. Italian Official Gazette. 1995. LQ 26/10/1995/447 - Framework Law on Environmental Noise Pollution Italy. Italian Official Gazette. 1995. LQ 26/10/1995/447 - Framework Law on Environmental Noise Pollution Italy.
4. H. Bendtsen. 2010. Noise Barrier Design: Danish and Some European Examples. Danish Road Institute - Road Directorate and University of California Pavement Research Center. Reprint Report: UCPRC-RP-2010-04. H. Bendtsen. 2010. Noise Barrier Design: Danish and Some European Examples. Danish Road Institute - Road Directorate and University of California Pavement Research Center. Reprint Report: UCPRC-RP-2010-04.