Book Zehe, Horst; (1980)
Die Gravitationstheorie des Nicolas Fatio de Duillier (/isis/citation/CBB000003903/)

Article Drake, Stillman; (1974)
Galileo's work on free fall in 1604 (/isis/citation/CBB000010866/)

Chapter Schmeidler, Felix; (1979)
Der Begriff der Schwerkraft im 16. und 17. Jahrhundert (/isis/citation/CBB000010392/)

Article Cohen, I. Bernard; (1981)
Newton's discovery of gravity (/isis/citation/CBB000013079/)

Book Steinle, Friedrich; (1991)
Newtons Entwurf “Über die Gravitation ...”: Ein Stück Entwicklungsgeschichte seiner Mechanik (/isis/citation/CBB000030225/)

Article Engelberg, Don; Gertner, Michael; (1981)
A marginal note of Mersenne concerning the “Galilean Spiral” (/isis/citation/CBB000013163/)

Article Honma, Eio; (1996)
The falling body problem in the collaboration of Beeckman and Descartes. (In Japanese) (/isis/citation/CBB000074855/)

Article Vilain, Christiane; (2011)
Galilée et la force centrifuge (/isis/citation/CBB807557796/)

Article Drake, Stillman; (1989)
Galileo's gravitational units (/isis/citation/CBB000044132/)

Article Cushing, J. T.; (1982)
Kepler's laws and unverisal gravitation in Newton's Principia (/isis/citation/CBB000018916/)

Article Moreira, Ildeu de Castro; (1991)
A expedição de Couplet à Paraíba, 1698 (/isis/citation/CBB000041912/)

Article Yokoyama, Masahiko; (1976)
G.A. Borelli and the demonstration of the times-squared law of fall based on the graphic method. (In Japanese.) (/isis/citation/CBB000016915/)

Article Weinstock, Robert; (1984)
Newton's Principia and the external gravitational field of a spherically symmetric mass distribution (/isis/citation/CBB000014545/)

Chapter Teichmann, Jürgen; (1996)
Der freie Fall bei Galilei: Messtechnik und Messmythos (/isis/citation/CBB000078750/)

Chapter Laymon, Ronald; (1983)
Newton's demonstration of universal gravitation and philosophical theories of confirmation (/isis/citation/CBB000028003/)

Article Sardelis, Dimitris A.; (1981)
The law of free fall: Myth and historical reality (/isis/citation/CBB000008219/)

Chapter Engfer, Hans-Jürgen; (1987)
Newton, Locke und Leibniz über “Kraft” und “Gravitation” (/isis/citation/CBB000056775/)

Article Barbatti, Mario; (1997)
Conceitos físicos e metafísicos no jovem Newton: Uma leitura do De gravitatione (/isis/citation/CBB000079722/)

Article Gendler, Tamar Szabó; (1998)
Galileo and the indispensability of scientific thought experiment (/isis/citation/CBB000081568/)

Article Yokoyama, Masahiko; (1974 (pub. 1975))
Huygens and the times-squared law of free fall (/isis/citation/CBB000016921/)