Bultheel, A., and H. Mart´Ä±nez. “An Introduction to the Fractional Fourier Transform and Friends”. CUBO, A Mathematical Journal 7, no. 2 (August 1, 2005): 201–221. Accessed October 11, 2025. https://cubo.ufro.cl/index.php/cubo/article/view/1549.