https://www.scirp.org/reference/ReferencesPapers?ReferenceID=1427642
Ozaktas, H.M., et al. (1996) Digital Computation of the Fractional Fourier Transform. IEEE...
Ozaktas, H.M., et al. (1996) Digital Computation of the Fractional Fourier Transform. IEEE Transactions on Signal Processing, 44, 2141-2150.