1. 1) Funabashi, I., Kobayasi, S. and Okimoto, H. : Experimental Study on Reinforcement of Steel Beam with Circular Hole, Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, pp. 1007-1008, 1968.10 (in Japanese) 舟橋功男, 小林昌一, 沖本弘 : 円形孔を有する鉄骨梁の補強に関する実験研究, 日本建築学会大会学術講演梗概集, pp. 1007-1008, 1968.10
2. 2) Funabashi, I., Kobayasi, S. and Okimoto, H. : Experimental Study on Reinforcement of Steel Beam with Circular Hole (Study on the Amount of Reinforcement), Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, pp. 1079-1080, 1969.8 (in Japanese) 舟橋功男, 小林昌一, 沖本弘 : 円形孔を有する鉄骨梁の補強に関する実験研（補強量に関する検討）, 日本建築学会大会学術講演梗概集, pp. 1079-1080, 1969.8
3. 3) Fukuchi, Y., Doi, Y. and Hosokawa, H. : On the Strength of Beams with Circular Holes and A Design Method Part-1 Non-Reinforced Holes, Transactions of the Architectural Institute of Japan, No. 296, pp. 27-36, 1980.10 (in Japanese)
4. 4) Fukuchi, Y., Doi, Y. and Kamae, K. : On the Strength of Beams with Circular Holes and A Design Method Part-2 Reinforced Holes by Sleeve Pipes, Transactions of the Architectural Institute of Japan, No. 301, pp. 43-51, 1981.3 (in Japanese)
5. 5) Doi, Y. and Fukuchi, Y. : On the Strength of Beams with Circular Holes and A Design Method Part-3 Proposal of Expressions to Estimate the Strength, Journal of Structural and Construction Engineering (Transactions of AIJ), No. 357, pp. 44-51, 1985.11 (in Japanese)