References
- Beranek L. L. Acoustic Measurements. John Wiley & Sons, Inc. 1967
- Papoulis A. The Fourier Integral and Its Applications. McGraw Hill. 1962
- Pedersen Boel S. Noter til specialforelasninger i Akustik, Frekvensanalyse I og II. Laboratoriet for Akustik. DTH. 1968