1. A First Course in Fourier Analysis
2. Tang K. T., Mathematical Methods for Engineers and Scientists 3. Fourier analysis, partial differential equations and variational methods (Springer, Berlin, 2007), pp. 12–60.
3. Spiegel M. R., Lipschutz S. and Liu J., Schaum's Mathematical Handbook of Formulas and Tables. Schaum's Outline Series (McGraw-Hill, New York, 2009), pp. 145–148.
4. Wavelet analyses and applications