The following publications are possibly variants of this publication:
- Formal, theoretical aspects of systems engineering: Comments on "Principles of Complex Systems for Systems Engineering" [Syst Eng 12 (2009), 295--311]Mary J. Simpson, Joseph J. Simpson. Systems Engineering, 13(2):204-207, March 2010. [doi]
- Formal, theoretical aspects of systems engineering : Comments on "Principles of Complex Systems for Systems Engineering" [Syst Eng 12 (2009), 295-311]Mary J. Simpson, Joseph J. Simpson. se, 13(2):204-207, 2010. [doi]