1. Bernd, B., Daniel, R.D., Hanson, C.E., et al., 2002. Noise Characteristics of the Transrapid TR08 Maglev System. Dot-vntsc-fra-02-13, US Department of Transportation.
2. Christensen, J.J., Hald, J., 2004. Technical Review Beamforming. Bruel&Kjear, Danmark, p.3–12.
3. Dittrich, M.G., Janssens, M.H.A., 2000. Improved measurement methods for railway rolling noise. Journal of Sound and Vibration, 231(3):595–609. [doi:10.1006/jsvi.1999. 2547]
4. He, B., 2010. Primary Investigation into External Noise Distribution Characteristics of High-speed Train and Damping Control Measures of Wheel. MS Thesis, Southwest Jiaotong Univesity, Chengdu, China (in Chinese).ISO (International Organization for Standardization), 2013. Acoustics-railway Applications—Measurement of Noise Emitted by Railbound Vehicles, ISO 3095:2013. ISO, Switzerland.
5. Johnson, D.H., Dudgeon, D.E., 1993. Array Signal Processing: Concepts and Techniques. Prentice Hall, New Jersey, p.94–99.