For original paper see Pei and Chen (IEEE Signal Process. Lett., vol.11, no.5, p.459-62, 2004). The present authors report that the same algorithm has been previously proposed in Bouguezel et al. (IEEE Int. Symp. Circuits Syst., vol.3, p.698-701, 2003).
['S. Bouguezel', 'M.O. Ahmad', 'M.N.S. Swamy']
A note on "Split vector-radix-2/8 2-D Fast Fourier Transform"