1. Transmissions of Information by Orthogonal Functions;Harmuth,1969
2. Sequency Theory: Foundations and Applications;Harmuth,1977
3. Orthogonal Transforms for Digital Signal Processing;Ahmed,1975
4. Walsh Functions and their Applications;Beauchamp,1975
5. Sampling principle for duration-limited signals and dyadic Walsh analysis;Butzer;Inform. Sci.,1978