1. Aquinas, T. (1980). Opera Omnia. Bad-Cannstatt: Frommann-Holzboog.
2. Duns Scotus, J. (1950). Opera Omnia. Civitas Vaticana: Typis Polyglottis Vaticanis.
3. Henry of Ghent. (1520). Summae quaestionum ordinariarum. Vaenundatur in aedibus Iodoci Badii Ascensii, Parisiis. (Repr. (1953). The Franciscan Institute, St. Bonaventure; E. Nauwelaerts, Louvain; F. Schöningh, Paderborn).
4. Ockham, W. (1974). Summa Logicae. In P. H. Boehner et al. (Eds.), Opera Philosophica (Vol. I). St. Bonaventure: The Franciscan Institute.
5. Suarez, F. (1947). On the various kinds of distinctions (Disputationes metaphysicae, Disputatio VII, de variis distinctionum generibus), trans. intro. Vollert C. Marquette University Press, Milwaukee.