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Sōseki, Natsume; trans. Takamiya, Toshiyuki; and Armour, Andrew (1999). " Kairo-kō: A Dirge". In Barber, Richard (Ed.). Arthurian Literature II. Rochester, New York: Boydell & Brewer.

Lacy, Norris J. (1991). The New Arthurian Encyclopedia. New York: Garland. .