Titsingh, Isaac. (1834). Annales des emepereurs du japon, pp. 188-194; Brown, Delmer et al. (1979). Gukanshō, pp. 326-329; Varley, H. Paul. (1980). Jinnō Shōtōki, pp. 205-212.
Titsingh, p. 190; Brown, p. 327; Varley, p. 44, 209; 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.
