Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yahei Fujii and Kenichi Tanaka,Traffic Capacity,Journal of Navigation,0373-4633,Cambridge University Press (CUP),1971-10,24,4,543-552,https://cir.nii.ac.jp/crid/1361699995833902080,https://doi.org/10.1017/s0373463300022384