1. Bobis, K., & Lequeux, J. (2008). Cassini, Rømer and the velocity of light. Journal of Astronomical History and Heritage, 11(2), 97–105.
2. Cardano, G. (1663). Hieronimy Cardani Mediolanensis Philosophi ac Medici Celeberrimi Operum tomus Quintus quo continentur Astronomica, Astrologica, Onirocritico. Ioannis Antonii Huguten, & Marci Antonii Ravaud.
3. Commandino, F. (1640). Pappi Alexandrini mathematicae collectiones in Latinum converse & commentariis illustratae. HH. de Duccijs.
4. Cretney, R. (2014). The origins of Euler’s early work on continued fractions. Historia Mathematica, 41, 139–156.
5. Gingerich, O. (2002). The trouble with Ptolemy. Isis, 93(1), 70–74.