1. L.R. Rabiner, R.W. Schafer: Digital Processing of Speech Signals (Prentice-Hall, Englewood Cliffs 1978)
2. D. Gabor: Theory of communication, J. IEE 93(III-26), 429-457 (1946)
3. D. Gabor: Acoustical quanta and the theory of hearing, Nature 159(4044), 591-594 (1947)
4. M. Vetterli, J. Kovačević: Wavelets and Subband Coding (Prentice-Hall, Englewood Cliffs 1995)
5. P.P. Vaidyanathan: Multirate Systems and Filter Banks (Prentice-Hall, Englewood Cliffs 1993)