Nussbaum, Louis-Frédéric. (2005). "Jō-an" in Japan Encyclopedia, p. 427, p. 427, at Google Books; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File. https://books.google.com/books?id=p2QnPijAEmEC&pg=PA427
Nussbaum, "Jishō" at p. 425, p. 427, at Google Books. https://books.google.com/books?id=p2QnPijAEmEC&pg=PA427
Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 195-200; Brown, Delmer et al. (1979). Gukanshō, pp. 330-333; Varley, H. Paul. (1980). Jinnō Shōtōki. pp. 212-214.
Brown, p. 332.
Titsingh, p. 197; Brown, pp. 331-332.
Titsingh, p. 197; Brown, p. 332.
Titsingh, p. 197.
Titsingh, p. 197; Brown, p. 329.
Titsingh, p. 197; Brown, p. 331.
Titsingh, pp. 197-198.
Minakata Kumagusu and F. Victor Dickens. (1905). "A Japanese Thoreau of the Twelfth Century," Journal of the Royal Asiatic Society of Great Britain and Ireland, p. 238., p. 238, at Google Books https://books.google.com/books?id=f1vJRjCl8HkC&pg=PA238