1. IPA White paper on embedded software development data. 2015 https://www.ipa.go.jp/files/000053553.pdf
2. IPA Guide to quality management for development of embedded software (revised version) 2012 https://www.ipa.go.jp/files/000005146.pdf
3. ISO/IEC 25010 Systems and software engineering - systems and software quality requirements and evaluation (SQuaRE) - system and software quality models 2011 https://www.iso.org/standard/35733.html
4. ISO/IEC 25021 Systems and software engineering - systems and software quality requirements and evaluation (SQuaRE) - quality measure elements 2012 https://www.iso.org/standard/55477.html
5. IPA Quality guide of software in the World. 2015 https://www.ipa.go.jp/files/000055008.pdf