1. Dixon, R.C.: Spread Spectrum Systems, (Wiley, New York 1976)
2. Proceedings, Agard Spread Spectrum Lecture Series, No. 58, May 1973
3. Agardograph No. 245, Part III, ‘JTIDS’ Papers 25–40, July 1979
4. IEE Conference Proceedings No. 63, SKYNET 1970