Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 96-97; Brown, Delmer et al. (1979). Gukanshō, pp. 279–280; Varley, H. Paul. Jinnō Shōtōki, p. 151.
Titsingh, p. 95; Brown, pp. 278–279; Varley, p. 44. [A distinct act of senso is unrecognized prior to Emperor Tenji; and all sovereigns except Jitō, Yōzei, Go-Toba, and Fushimi have senso and sokui in the same year until the reign of Emperor Go-Murakami.
Titsingh, p. 96; Brown, p. 280; Varley, H. Paul. (1980). Jinnō Shōtōki, p. 44.