1. The analysis of traffic accidents—studies in marine traffic engineering;Fujii;Journal,1971
2. Analysis of crossing of pairs of ship routes and its application;Hara;J. Nautical Society of Japan,1972
3. The distribution of collisions in Japan and methods of estimating collision damage;Fujii;Journal,1973
4. A consideration of the effective domain;Fujii;J. Nautical Society of Japan,1970