1. Aeronautics (2015) Pipeline monitoring, oil & gas security. http://www.aeronautics-sys.com/home-page/solutions/hls/ . Accessed 17 Feb 2016
2. Aeryonlabs (2011) BP oil spill response; executive summary. https://www.youtube.com/watch?v=oUT3Lxj5TZs . Accessed 17 Feb 2016
3. Alawode AJ, Ogunleye IO (2011) Maintenance, security, and environmental implications of pipeline damage and ruptures in the Niger Delta region. Pac J Sci Tech 12(1):565–573
4. Allen G, Gallagher M, Hollingsworth P, Illingworth S, Kabbabe K, Percival C. (2014) Feasibility of aerial measurements of methane emissions from landfills. Report - SC130034/R. Environmental Agency, Horizon House, Deanery Road, Bristol, BS1 5AH, United Kingdom
5. Allen G, Pitt J, Hollingsworth P, Mead I, Kabbabe K, Roberts G, Percival C (2015) Measuring landfill methane emissions using unmanned aerial systems: field trial and operational guidance. Report – SC140015. Environmental Agency, Horizon House, Deanery Road, Bristol, BS1 5AH, United Kingdom