1. A class of nonharmonic Fourier series;Duffin;Transactions of the American Mathematical Society,1952
2. An Introduction to Nonharmonic Fourier Series;Young,1980
3. The Fourier Transforms in the Complex Domain;Paley,1934
4. A Wavelet Tour of Signal Processing;Mallat,1998
5. Ten Lectures on Wavelets;Daubechies,1991