1. Alexander, A. (2014). Infinitesimal: How a dangerous mathematical theory shaped the modern world. New York: Scientific American/Farrar, Straus and Giroux.
2. Andersen, K. (1986). The method of indivisibles: Changing understandings. In A. Heinekamp (Ed.), 300 Jahre “Nova methodus” von G. W. Leibniz (1684–1984) (pp. 14–25). Stuttgart: Steiner.
3. Andreae, J. (1979). Formula of concord: Epitome. Milwaukee: Northwestern Publishing. (Originally published in 1580).
4. Aquinas, T. (1947). Summa theologica. The fathers of the English Dominican Province (Trans.). New York: Benziger Brothers.
5. Aristotle (1984). The complete works of Aristotle. Barnes (Ed.). Princeton: Princeton University.