SEI 1
Software Engineering Institute. The IDEAL Model. http://www.sei.cmu.edu/ideal/ideal.html.
SEI 2
Software Engineering Institute. CMMI Frequently Asked Questions (FAQs). http://www.sei.cmu.edu/cmmi/adoption/cmmi-faq.html.
SEI 3
Software Engineering Institute. CMMI Performance Results. http://www.sei.cmu.edu/cmmi/results.html.