1. Managing the complexity of spi in small companies;Horvat;Software Process: Improvement and Practice,2000
2. Pries-Heje J Johansen J Spi manifesto http://www.iscn.com/Images/SPI http://www.iscn.com/Images/SPI_Manifesto_A.1.2.2010.pdf 2010
3. CMMI Product Team CMMI for Development, Version 1.3 2010
4. ISO/IEC JTC 1/SC 7. ISO/IEC 15504:2004: Software Process Assessment-Part 4: Guidance on use for process improvement and process capability determination 2004
5. Process assessment considered wasteful;Fayad;Communications of the ACM,1997