1. Edwards, C.R.: The application of the Rademacher-Walsh transform to Boolean function classification and threshold logic synthesis. Trans. IEEE C24, 48–62 (1975)
2. Hurst, S.L.: The Logical Processing of Digital Signals, Crane. Russak & Company Inc./Edward Arnold, New York, London (1978)
3. Karpovsky, M., Stankovic, R.S., Astola, J.: Spectral Logic and Its Applications for the Design of Digital Devices. Wiley, Hoboken (2008)
4. Qu, C., Seberry, J., Pieprzyk, J.: A construction of hyperbent functions with polynomial trace form. Discrete Appl. Math. 102, 133–139 (2000)
5. Stankovic, S., Stankovic, M., Astola, J.: Representation of multiple-valued functions wuth flat Vilenkin-Chrestenson spectra by decision diagram. J. Multiple-Valued Logic Soft Comput. 23(5–6), 485–501 (2014)