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Matsunaga, Daigan, Matsunaga, Alicia (1996), Foundation of Japanese Buddhism, Vol. 2: The Mass Movement (Kamakura and Muromachi Periods), Los Angeles; Tokyo: Buddhist Books International, 1996. ISBN 0-914910-28-0
Stone Jacqueline 1999. Original Enlightenment and the Transformation of Medieval Japanese Buddhism, University of Hawaii Press, Honolulu, HI, ISBN 0-8248-2026-6.