1. Elliott, D.F., & Rao, K.R. (1982). Fast transforms algorithms, analyses, application. New York: Academic Press.
2. Ahmed, N., & Rao, K.R. (1975). Orthogonal transforms for digital signal processing. New York: Springer.
3. Oppenheim, A.V., Schafer, R.W., & Buck, J.R. (1999). Discrete time signal processing, (pp. 629–691). Upper Saddle River: Prentice Hall Publishers.
4. Mohamed Asan Basiri, M., & Sk, N.M. (2016). Multimode parallel and folded VLSI architectures for 1D Fast fourier transform, Integration the VLSI Journal (Vol. 55, pp. 43–56). Amsterdam: Elsevier.
5. Nayak, S.S., & Meher, P.K. (1999). High throughput VLSI implementation of discrete orthogonal transforms using bit-level vector matrix multiplier. IEEE Transactions on Circuits and Systems-II, 46(5), 655–658.