Hisashi Sumitomo
- Education And Researches Needed For Water Supply Engineering In The 21 Century. In: 土木学会論文集 (Doboku Gakkai rombunshū), v. 2002, n. 713 (August 2002). (2002):
- Effect Of Water Environment Improvement Of Lake Biwa From The Viewpoint Of The Area Inviting Recreation. In: 土木学会論文集 (Doboku Gakkai rombunshū), v. 2003, n. 734 (Mai 2003). (2003):