1. ICAO (2019). Doc 10004, Global Aviation Safety Plan 2020–2022, International Civil Aviation Organization. Available online: https://www.icao.int/Meetings/anconf13/Documents/Doc_10004_GASP_2020_2022_Edition.pdf#search=Doc%2010004.
2. IATA (2016). Controlled Flight Into Terrain (CFIT), International Air Transport Association. Available online: https://www.iata.org/en/programs/safety/controlled-flight-into-terrain/.
3. ICAO (2022). The Annual ICAO Safety Report, International Civil Aviation Organization. Available online: https://www.icao.int/safety/Pages/Safety-Report.aspx.
4. IATA (2018). Controlled Flight Into Terrain Accident Analysis Report 2008–2017 Data, International Air Transport Association. Available online: https://www.iata.org/contentassets/06377898f60c46028a4dd38f13f979ad/cfit-report.pdf.
5. ICAO (2019). State of Global Aviation Safety, International Civil Aviation Organization. Available online: https://www.icao.int/safety/Documents/ICAO_SR_2019_final_web.pdf.