1. Demarco , T. Structured Analysis and System Specification Prentice-Hall Englewood Cliffs, NJ 1979
2. Eisner H. Computer Aided Systems Engineering Prentice Hall 1988 17
3. Faisandier , Alain Revisiting the notion of system - Organizations and Enterprises as systems 2005
4. Hammer , M. Beyond Reengineering Harper Business New York 1996
5. Biting the Silver Bullet: Toward a Brighter Future for System Development;Harel;Computer,1992