1. Naur, P., Randell, B. (eds.): 1968 NATO Conference, “Software Engineering”, Report on a Conference Sponsored by the NATO SCIENCE COMMITTEE, Garmisch, Germany, 7–11 October 1968. Scientific Affairs Division NATO, Brussels, Belgium (1968).
http://homepages.cs.ncl.ac.uk/brian.randell/NATO/nato1968.PDF
2. Pyle, I.C.: Some techniques in multi-computer system software design. Softw. Pract. Experience 2, 43–54 (1972)
3. Stenson, J.: Reconfiguration of computers in critical systems. In: Computing with Real Time Systems: Proceedings of First European Seminar on Real-Time Programming, A.E.R.E. Harwell, 5–7 April 1971. Transcripta Books (1972)
4. Fourth report from the Select Committee on Science and Technology, Session 1970–71: The prospects for the United Kingdom Computer Industry in the 1970’s, vol. 3: Appendix 42: The Linesman and Mediator Projects (Plessey). HMSO 621-III (1971)
5. Plessey document (“Restricted”): “Software Standard”, reference number SSJ 000001 of 27.11.70, later changed to MSJ 000001 (1970)