1. 2National Transporatation Safety Board, 2015, "NTSB most wanted list of transporation safety improvements." Retrieved from http://www.ntsb.gov/safety/mwl/Documents/MWL_2015_Factsheet_07.pdf.
2. 4International Civil Aviation Organization, 2014, ICAO Document 10011 Manual on aeroplane upset prevention & recovery training. Retrieved from www.icao.int/Meetings/LOCI/Documents/10011_draft_en.pdf.
3. 5Federal Aviation Administration, 2015, Advisory Circular AC 120-111, Upset prevention and recovery training. Retrieved from http://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_120-111.pdf.