Author	Title	Journal	ISSN	Publisher	Date	Volume	Number	Page	URL	URL(DOI)
劉 峭,Pedersen Egil	Direct Perception of Collision Danger Information for Safe Marine Navigation(Research Institute at Outside Organizations)	Papers of National Maritime Research Institute	13465066	National Maritime Research Institute	2004-12-28	4	5	599	http://ci.nii.ac.jp/naid/110007660881/en/