1. Ackoff, R.L., 1979a, “The future of operational research is past”,Operational Research Society Journal,30(2):93–104.
2. Ackoff, R.L., 1979b, “Resurrecting the future of operational research”,Operational Research Society Journal,30(3): 189–199.
3. Churchman, C.W., 1959, “Why measure?” in: Measurement: Definition and Theories, C.W. Churchman and P. Ratoosh, eds., Wiley, New York, pp. 83–94.
4. Churchman, C.W., 1961,Prediction and Optimal Decision, Prentice-Hall, Englewood Cliffs, NJ.
5. Churchman, C.W., 1968a,Challenge to Reason, McGraw-Hill, New York.