1. K. Keele and C. Pedretti, Leonardo da Vinci, Corpus of Anatomical Studies in the Collection of her Majesty The Queen at Windsor Castle (Harcourt Brace Jovanovich, New York, 1979).
2. C. D. O’Malley and J. B. Saunder, Leonardo on the Human Body (Dover Publications, Mineola, New York, 1983).
3. Leonardo's vision of flow visualization
4. D. M. McDowell and J. D. Jackson, Osborne Reynolds and Engineering Science Today (Manchester University Press, Manchester, 1970), p. 78.
5. XXIX. An experimental investigation of the circumstances which determine whether the motion of water shall be direct or sinuous, and of the law of resistance in parallel channels