Pages 2 to 4, Section 1.1, "Skating", Chapter 1, "Things that Move", Louis Bloomfield, Professor of Physics at the University of Virginia, How Everything Works: Making Physics Out of the Ordinary, John Wiley & Sons (2007), hardcover, ISBN978-0-471-74817-5
Stillman Drake - Essays on Galileo etc. Vol 3. Page 285.
Véase el artículo de Alan Chalmers "Galilean Relativity and Galileo's Relativity", en Correspondence, Invariance and Heuristics: Essays in Honour of Heinz Post, eds. Steven French and Harmke Kamminga, Kluwer Academic Publishers, Dordrecht, 1991, pp. 199–200, ISBN0792320859. Chalmers no cree, sin embargo, que la física de Galileo tuviera un principio general de inercia, circular o de otro tipo. page 199
Espinoza, Fernando. "An Analysis of the Historical Development of Ideas About Motion and its Implications for Teaching". Physics Education. Vol. 40(2). Medieval thought.
Aristotle: Minor works (1936), Mechanical Problems (Mechanica), University of Chicago Library: Loeb Classical Library Cambridge (Mass.) and London, p.407, «...it [a body] stops when the force which is pushing the travelling object has no longer power to push it along...».
