Bevilaqua, Fabio; Lidia Falomo; Lucio Fregonese; Enrico Gianetto; Franco Giudise; Paolo Mascheretti. The pendulum: From constrained fall to the concept of potential. The Pendulum: Scientific, Historical, Philosophical, and Educational Perspectives. Springer: 195–200. 2005 [2008-02-26]. ISBN 1-4020-3525-X. (原始内容存档于2014-01-11). 详细描述了惠更斯的方法
Bevilaqua, Fabio; Lidia Falomo; Lucio Fregonese; Enrico Gianetto; Franco Giudise; Paolo Mascheretti. The pendulum: From constrained fall to the concept of potential. The Pendulum: Scientific, Historical, Philosophical, and Educational Perspectives. Springer: 195–200. 2005 [2008-02-26]. ISBN 1-4020-3525-X. (原始内容存档于2014-01-11). 详细描述了惠更斯的方法