1. International Civil Aviation Organization (ICAO)http://www.icao.int/
2. OCHA Policy Development and Studies Barnch—PDSB (2014), Unmanned Aerial Vehicles in Humanitarian Responsehttps://docs.unocha.org/sites/dms/Documents/Unmanned%20Aerial%20Vehicles%20in%20Humanitarian%20Response%20OCHA%20July%202014.pdf
3. Emergency Mapping Guidelineshttp://www.un-spider.org/sites/default/files/IWG_SEM_EmergencyMappingGuidelines_A4_v1_March2014.pdf