1. Katz, V.J., Parshall, K.H.: Taming the Unknown: A History of Algebra from Antiquity to the Early Twentieth Century, pp. 227–246. Princeton University Press, Princeton (2014)
2. Translation by Filippo Camerota, in his essay, Teaching Euclid in a Practical Context: Linear Perspective and Practical Geometry. In: Science & Education 15, p. 323 (2006)
3. See for example, Long, P.O.: Openness, Secrecy, Authorship: Technical Arts and the Culture of Knowledge from Antiquity to the Renaissance. Johns Hopkins University Press, Baltimore (2001)
4. Regarding mathematical treatises, see: van Egmond, W.: The Commercial Revolution and Beginnings of Western Mathematics in Renaissance Florence, 1300–1500. Ph.D. Dissertation, Indiana University (1976), pp. 590–596
5. The Manuscripts of Leonardo da Vinci in the Institut de France, Manuscript M. Venerella, J. (trans. and ann.), p. 57. Ente Raccolta Vinciana, Milan, Castello Sforzesco (2001). Venerella refers to Leonardo’s velocità as “velocity”, though this can be confused with modern “velocity”. Hence my translation of velocità as “speed”