1. Directive 2002/49/EC of the European Parliament and Council of 25 June 2002, relating to the assessment and management of environment noise.
2. Determination of noise source heights, Part II. Measurement of the equivalent source height of highway vehicles;S. Glegg;Journal of Sound and Vibration,1990
3. Vehicle pass-by noise control at Porsche;H. Grossmann,1997
4. ISO 1996/1 Acoustics - Description and measurement of environmental noise - Part 1: Basic quantities and procedure.
5. Janczur R. (1990), Theoretical and scale-model investigation of a point source acoustical field in the presence of reflecting surfaces and screen, [Ph.D. Thesis, in Polish], Institute of Fundamental Technological Research Report, 8.