Jien, Delmer Myers BrownThe Future and the Past: A Translation and Study of the Gukanshō. (em inglês) University of California Press, 1979 p. 168 ISBN 9780520034600
Mikael S. Adolphson, The Gates of Power: Monks, Courtiers, and Warriors in Premodern Japan (em inglês) University of Hawaii Press, 2000 p 189-193 ISBN 9780824823344