1. Abramson, R. F. “Sinc and Cosinc Transform”, IEEE Trans. Electromagn. Compat., EMC-19, n 2, p.88–94.
2. “Analysis of Multivariate Non-Stationary Signals”;Adams,1981
3. Agaian, S. S. (1980). “Algorithms of Orthogonal Matrices Fast Transform”, Progress in Cybernetics and Systems Research, Vol. 8; General Systems Method., Mathe. Systems Theory, Fuzzy Sets. (Part of the proceedings of the 5th European Mtg. on Cybernetics and Syst. Res.) Vienna, Aus.
4. “Generalized Transform”;Ahmed,1971
5. Ahmed, N., Rao, K. R. (1971). “Transform Properties of Walsh Functions”, Proceed. of the IEEE Fall Elect. Conf. p. 378–82. Chicago.