1. BSI: FAQs | BIM Level 2. http://bim-level2.org/en/faqs/ . Accessed 20 Apr 2018
2. Institution of Civil Engineers: State Of The Nation 2017: Digital Transformation (2017)
3. BSI: PAS 1192-5: 2015: Specification for security-minded building information modelling, digital built environments and smart asset management (2015)
4. BuildingSMART International: Open Standards - the basics - buildingSMART (2018). https://www.buildingsmart.org/standards/technical-vision/open-standards/ . Accessed 20 Apr 2018
5. West, J.: Seeking open infrastructure: Contrasting open standards, open source and open innovation. First Monday (2007)