Takaaki Oki
- Research On Sewage Sludge Treatment By Fluoride Electrolysis, And It's Utilization. Dans: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1986, n. 369 (mai 1986). (1986):
- Research On The Sewage Sludge Treatment By Fluoride Electrolysis Using Incinerator Ash. Dans: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1990, n. 423 (novembre 1990). (1990):