Bevilaqua, Fabio; Lidia Falomo; Lucio Fregonese; Enrico Gianetto; Franco Giudise; Paolo Mascheretti (2005). "The pendulum: From constrained fall to the concept of potential". The Pendulum: Scientific, Historical, Philosophical, and Educational Perspectives. Springer. pp. 195–200. ISBN1-4020-3525-X. Retrieved 2008-02-26. gives a detailed description of Huygens' methods
Chareix, F. (2004). Huygens and mechanics. Proceedings of the International Conference "Titan - from discovery to encounter" (April 13–17, 2004). Noordwijk, Netherlands: ESA Publications Division, ISBN92-9092-997-9, p. 55 - 65.