"Undersecretary of Defense [AT&L]. 2008. Systems Engineering Guide for Systems of Systems, Version 1.0. Washington, DC: Office of the Deputy Under Secretary of Defense for Acquisition and Technology, Systems and Software Engineering."
Capability Assurance Institute
The Art and Science of Solution Effectiveness
"Undersecretary of Defense [AT&L]. 2008. Systems Engineering Guide for Systems of Systems, Version 1.0. Washington, DC: Office of the Deputy Under Secretary of Defense for Acquisition and Technology, Systems and Software Engineering."