"Scotus or Duns Scotus is generally considered to be one of the three most important philosopher-theologians of the High Middle Ages[Thomas Aquinas, William Ockam, and Scotus]" (Wikipedia, Duns Scotus)

• Bl. John Duns Scotus（英語テキストのリンク集：フランシスコ会派）
• Online Books & Resources for Theology
• John Duns Scotus, Stanford Encyclopedia of Philosophy
• Opera omnia (1868), Internet Archives
• Medival Philosophy
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• L-Duns_Scoti_Ordinatio_1989.pdf, in Japanese text with password