1. Green Paper on “Future Noise Policy”,1996
2. Calculation of Railway Noise,1995
3. Roughness on dutch railway wheels and rails;Dings;J. Sound Vib.,1996
4. E. N. Directive, Commission directive (eu) 2015/996 of 19 may 2015 establishing common noise assessment methods according to directive 2002/49/ec of the european parliament and of the council, http://data.europa.eu/eli/dir/2015/996/oj (2015).