*[http://links.jstor.org/sici?sici=0095-6848(199324)19%3A1%3C121%3ATMMITT%3E2.0.CO%3B2-Z "The Missing Minamoto in the Twelfth-Century Kanto"], by Jeffrey P. Mass. ''Monumenta Nipponica'', Vol. 19, No. 1. (Winter, 1993), pp. 121-145.
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*[http://links.jstor.org/sici?sici=0095-6848(199324)19%3A1%3C121%3ATMMITT%3E2.0.CO%3B2-Z "The Missing Minamoto in the Twelfth-Century Kanto"], by Jeffrey P. Mass. ''[[Monumenta Nipponica]]'', Vol. 19, No. 1. (Winter, 1993), pp. 121-145.