Cross, Richard (2014). Duns Scotus's Theory of Cognition. Oxford University Press. стр. 18. ISBN9780199684885. „Scotus is a good Aristotelian, in the sense that he believes that cognition always has an empirical starting point”
Williams, Thomas (2019), „John Duns Scotus”, The Stanford Encyclopedia of Philosophy
Spade, Paul Vincent (2018), „Medieval Philosophy”, The Stanford Encyclopedia of Philosophy, „Histories of medieval philosophy often treat Thomas Aquinas (1224/25–74), John Duns Scotus (c. 1265–1308), and William of Ockham (c. 1287–1347) as the “big three” figures in the later medieval period; a few add Bonaventure (1221–74) as a fourth.”
