1. Japan Electric Power Civil Engineering Association “One hundred years’ history of hydropower plants” (in Japanese), 1992.
2. Hirosige Kitada and Tsutomu Fukui, (2014) “New high-strength steel that makes a breakthrough in the marine field” (in Japanese), Seizando,
3. Noriyuki Hara, Takeshi Sugino and Minoru Otsu, (2001) “High-tough welding consumables for 950 N/mm2 class high-strength steels”, Kobe Steel Engineering Reports, Vol. 51.
4. Sato M, Hara N (2009) Welding consumables for 780MPa and 950 MPa class high strength steels. J Jpn Weld Soc 78(6):550–554
5. ISO 12135:(2016), “Metallic materials – Unified method of test for the determination of quasistatic fracture toughness”.