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worldcat.org
Miyagawa Nobuo (2012). "天正期北関東政治史の一齣 : 徳川・羽柴両氏との関係を中心に" [A Scene in the Political History of Northern Kanto during the Tensho Period: Focusing on the Relationship with the Tokugawa and Hashiba Clan]. 駒沢史学 (78). 駒沢史学会: 19–37. ISSN0450-6928.（Addendum: Kazuhiro Marushima (丸島和洋), 2011, page 4）
