Issue No. 05 - May (1971 vol. 20)
M. Drubin , Interstate Electron. Corp.
A method is presented which utilizes the results of the Glassman paper  to factor the FFT matrix in terms of Kronecker product expansions , . The method clarifies the Glassman results and presents them in an elegant and compact format.
Compact matrix notation, discrete Fourier transform, fast Fourier transform, Kronecker product expansions, mixed radix.
M. Drubin, "Kronecker Product Factorization of the FFT Matrix", IEEE Transactions on Computers, vol. 20, no. , pp. 590-593, May 1971, doi:10.1109/T-C.1971.223306