См.: Stillman Drake, Galileo at Work – His Scientific Biography (University of Chicago Press, Chicago, Ill., 1978), pp. 128–32; A. J. Hahn, The Pendulum Swings Again: A Mathematical Reassessment of Galileo's Experiments with Inclined Planes // Archive for the History of the Exact Sciences 56, 339 (2002), с репродукцией на p. 344.