1. NIST Computer Security Resource Center: Definition of Security Posture (2020). https://csrc.nist.gov/glossary/term/security_posture. Accessed 10 July 2020
2. Europol: Attacks On Critical Infrastructures (2020). https://www.europol.europa.eu/iocta/2015/attacks-on-ci.html. Accessed 10 July 2020
3. The European Parliament and the Council of European Union: Directive (EU) 2016/1148 of the European Parliament and of the Council of 6 July 2016 concerning measures for a high common level of security of network and information systems across the Union (2016)
4. The White House: Presidential Policy Directive - Critical Infrastructure Security and Resilience (2013). https://obamawhitehouse.archives.gov/the-press-office/2013/02/12/presidential-policy-directive-critical-infrastructure-security-and-resil. Accessed 10 July 2020
5. NIST: Framework for Improving Critical Infrastructure Cybersecurity (2018)