1. Manual on Remotely Piloted System (RPAS) (2015) International Civil Aviation Organization, Doc 119
2. Safety Management Manual (2017) ICAO Doc 9859
3. Kim A, Wampler B, Goppert J, Hwang I Cyber attack vulnerabilities analysis for unmanned aerial vehicles. Am Inst Aeronaut Astronaut 1–30. https://static1.squarespace.com/
4. Cyber Security Research Alliance (Apr 2013) Designed-in cyber security for cyber-physical systems - workshop report by the cyber security research alliance. Cyber Security Research Alliance. http://www.cybersecurityresearch.org/documents/CSRA_Workshop_Report.pdf. Accessed 31 Jan 2015
5. Watkins SG (2013) An Introduction to Information Security and ISO27001:2013. IT Governance Publishing, Ely