1. John Duns Scotus. 1963. Ordinatio: Liber primus, a distinctione vigesima sexta ad quadragesimam octavam, ed. Carolus Balić et al. Opera Omnia 6. Vatican City: Typis Polyglottis Vaticanis.
2. ———. 1982. De primo principio. Edited and translated by Allan B. Wolter, in A Treatise on God as First Principle: A Latin Text and English Translation of the De primo principio. 2nd edition. Chicago: Franciscan Herald Press.
3. ———. 2013. Ordinatio: Liber quartus, a distinctione quadragesima tertia ad quadragesimam nonam, ed. Barnaba Hechich et al. Opera Omnia 14. Vatican City. Typis Polyglottis Vaticanis.
4. William of Ockham. 1967–88. Opera omnia. Edited under the direction of Gedeon Gál. 17 volumes. St. Bonaventure: Franciscan Institute.
5. Adams, Marilyn McCord. 1987a. Was Ockham a Humean about Efficient Causality? Franciscan Studies 39: 5–48.