| An Introduction to Fourier Theory: A mathematically inclined introduction with illustrations and explanations of related theorems, its properties and numerical methods for calculating transforms. | |
| Fast Fourier Transforms: Survey and history of FFT algorithms from Wikipedia. | |
| Fast Fourier Transform: Article in MathWorld. | |
| Introduction to the Fourier Transform: Notes on applications to Image Processing. | |
| Mathematics of the Discrete Fourier Transform (DFT): Notes by Julius O. Smith III, Stanford. |
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