1. Alcatel, L. (2012). Getting Smart about Smart Cities Recommendations for Smart City Stakeholders. Whitepaper. Retrieved April 20, 2016 from http://enterprise.alcatel-lucent.com/assets/documents/120605_FINAL_M2012042836_Getting_Smart_about_Smart_City_EN_MarketAnalysis.pdf
2. Australian Government. (2011). Australian Government Architecture Reference Models. Retrieved May 14, 2017 from http://www.finance.gov.au/policy-guides-procurement/australian-government-architecture-aga/aga-rm/
3. City & technology: An analysis matrix to serve citizens
4. British Standard Institute. (2012). UK Government Reference Architecture (UKRA). Retrieved May 14, 2017 from https://www.gov.uk/government/publications/uk-government-ict-strategy-resources
5. British Standard Institute. (2014). Customer service Smart city framework – Guide to establishing strategies for smart cities and communities Retrieved May 15, 2017 from http://shop.bsigroup.com/upload/267775/PAS 181 (2014).pdf