Yasuhiro Okamatsu
- Study on Breakdown of Stonewalls of Former Edo Castle and their Repair-works. In: Historical Studies in Civil Engineering, v. 18 ( 1998). (1998):
- Study on Repair-works for Stone Walls of Former Edo Castle after the Kanto Earthquake. In: Historical Studies in Civil Engineering, v. 17 ( 1997). (1997):