id	domain	url
fumecheng-3768	doi.org	https://doi.org/10.22190/fume180321014c
fumecheng-3768	www.tc.faa.gov	www.tc.faa.gov/its/worldpac/techrpt/ar10-6.pdf
fumecheng-3768	www.dtic.mil	http://www.dtic.mil/dtic/tr/fulltext/u2/b112288.pdf