Takaaki Ohki
- The Investigation Of Ceramic Pipe Containing A Mixture Of Incinerated Sewage Sludge Ash. Dans: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1999, n. 615 (février 1999). (1999):
- Utilization Of Regenerating Waterworks Sludge To Resources By Fluoride Electrolysis As A Material Of Planting Ground In Slope Seeding. Dans: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1999, n. 629 (août 1999). (1999):