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4. 4) Kuwamura, H. : Compressive Failure of Twist-formed Short Bars – Triaxial instability of compression members, Part 2 – Summaries of Technical Papers of Annual Meeting, Architectural Institute of Japan, Structure III, pp. 1015-1016, 2019.9 (in Japanese) 桑村仁：ねじり成形平鋼短柱の崩壊挙動－圧縮材の三軸不安定 その2－, 日本建築学会大会学術講演梗概集, 構造 III, pp. 1015-1016, 2019.9
5. 5) Kuwamura, H. : Analysis of Compressive Elasticity of Helicoidal Bars, Proceedings of Annual Research Meeting Kanto Chapter, Architectural Institute of Japan, No. 2010, pp. 193-196, 2020.3 (in Japanese) 桑村仁：棒状螺旋板の圧縮弾性解析, 日本建築学会関東支部研究報告集, No. 2010, pp. 193-196, 2020.3