Bibliography
- Yamamoto, Shichihei (October 2006). 洪思翊中将の処刑 (The execution of General Hong Sa Ik). Japan: Chikuma Shobo.
- Ammenthorp, Steen. "Kou, Shiyoku". The Generals of World War II. http://www.generals.dk/general/Kou/Shiyoku/Japan.html.
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