1. Bank of Japan. “Nichibei Boeki No Choki Teki Doko. [The Long-term Trend of Japan-U.S. Trade.]” Chosa Geppou [Monthly Research Bulletin], October 1972.
2. Do, T. H. “Vietnam and China: Ideological Bedfellows, Strange Dreamers.„ Paper submitted to the current issue of Journal of Contemporary East Asia Studies.(2021).