1. Cohen, L.: ‘Time–frequency analysis’, (Prentice-Hall 1995)
2. Time-frequency distributions-a review
3. Jackson, J.D.: ‘Classical electrodynamics’, (Wiley 1992)
4. Lighthill, J.: ‘Waves in fluids’, (Cambridge University Press 1978)
5. Morse, P.H., and Ingard, K.U.: ‘Theoretical acoustics’, (McGraw-Hill 1968)