TAKAHASHI Hirofumi, SAKAI Hideo, USUDA Hisao, WATADA Tomohiro, FURUKAWA Kuniaki. Constructing L-shaped steel retaining wall and its bearing capacity. Journal of The Japan Forest Engineering Society. 2015. 30. 2. 79-84
USUDA Hisao, FURUKAWA Kuniaki, SUZUKI Hidenori, OGURA Akira. A study of the turbid water runoff prevention in spur road : The effect of sedimentation tank(<SPECIAL ISSUE>Technical challenges of roads development II). 森林利用学会誌. 2014. 29. 2. 97-100