Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) INOUE Kinzo,Concept of Potential Area of Water as an Index of Risk Assessment of Ship Handling,"The Journal of Navigation, The Royal Institute of Navigation",,,1990,43,1,1-7,https://cir.nii.ac.jp/crid/1570291226731188352,