https://www.incose.org/systems-engineering

https://systemdynamics.org/what-is-system-dynamics/

https://www.sebokwiki.org/wiki/INCOSE_Systems_Engineering_Handbook

http://wayback.archive-it.org/10432/20180521184322/http://lm.systemdynamics.org/DL-IntroSysDyn/index.html

https://www.mtsu.edu/et/

https://www.mtsu.edu/msps/