1. Ashour, S., 1972, “Sequencing Theory” Lecture Notes in Economics and Mathematical Systems, 69, Springer-Verlag, Berlin.
2. Bergland, G. D., 1981, “A Guided Tour of Program Design Methodologies” Computer, 14, (10), pp. 13–37.
3. Canning, R. G., 1974, “Improving the System Building Process” EDP ANALYZER, 12, (12).
4. Churchman, C. W., Ackoff, R. L, and Arnoff, E. L., 1957, Introduction to Operations Research, Wiley, New York.
5. Conway, R. W., Maxwell, W. L., and Miller, L. W., 1967, Theory of Scheduling, Addison-Wesley, Reading, Mass.