1. Zen, K.; Abe, M.: Corrosion Survey of Steel Structures at Harbours (1st Report), Corrosion Surveys of Steel Structures at Hirohata, Osaka, Shibushi, Sasebo, Shimonoseki, and Toyama Harbors, Technical Note of the Port and Harbour Research Institute, No. 49, June 1968.
2. Zen, K.; Abe, M.: Corrosion Surveys of Steel Structures in Marine Environments (1978–1981 Surveys), Technical Note of the Port and Harbour Research Institute, No. 413, March 1982.
3. Zen, K.; Yokoi, T.; Abe, M.: Performances of Steel Structures under Marine Environment, being Applied Cathodic Protection (Part 1), Technical Note of the Port and Harbour Research Institute, No. 475, March 1984.