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青森県 (2004). 青森県史: 資料編. 中世, Volume 1 [Aomori Prefectural History: Documents. Middle Ages, Volume 1] (in Japanese). Aomori Prefecture History Editor Medieval Section. pp. 274, 702. Retrieved 19 May 2024.
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中央公論新社(編) (2020). 歴史と人物 Volume 11 [History and People volume 11 Interesting People Japanese History Ancient and Medieval Edition] (in Japanese). 中央公論新社(編). p. 104. ISBN9784128001453. Retrieved 19 May 2024.
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