1. Rufin Makerewicz. Influence of ground effect and refraction on road traffic noise. Applied Acoustics, (1997).
2. Z.Y. Feng: Analysis and preventive treatment of road traffic noise, Heilongjiang Traffic Science and Technology, vol. 7(2007), p.92, 94.
3. J.H. Chen Z.J. Ji, J. Wang: Computer simulation and practical measurement research of new type of sound barrier, The 2010 nationwide acoustic design and noise-vibration control engineering and academic conference thesis collections of auxiliary equipment, (2010).
4. C.J. Padmos, F. de Roo: Sound diffraction testing of noise barrier tops according to PrCEN/TS 1793-4, 8th International congress of Acoustics, 2004. 2.
5. R. Pirichieva: Model study of the sound propagation behind barriers of finite length, Acoust. Soc. Am. 1990, 87(5), pp.2109-2113.