1. Avicenna (Ibn Sina) (1877) The canon of medicine. Bulaq, Cairo
2. Barone A (2007) The Italian achievement: an A–Z of over 1000 firsts achieved by Italians in almost every aspect of life over the last 1000 years. Renaissance Books, Folkestone, p 144
3. Briggs W (1809) A new theory of vision. Philos Trans R Soc Lond A 2:540–542
4. Calkins CM, Franciosi JP, Kolesari GL (1999) Human anatomical science and illustration: the origin of two inseparable disciplines. Clin Anat 12:120–129
5. Chandwick J, Mann WN (1950) The medical works of Hippocrates. Blackwell Scientific, London, p 264