1. Hippocrates: The Internet Classics Archive 1994; Book 2, Part 7. English translation: Adams F. The Genuine Works of Hippocrates. On Airs, Waters, and Places. 400 BCE. 1849, London: Sydenham Society, 179-222.
2. Sammonicus QS: Liber Medicinalis. C. 210. Chapter 51, verse 944
3. Wootton A: Chronicles of Pharmacy, volume 1. 1910, London: Macmillan and Co., 164-166.
4. Skemer D: Binding words: Textual amulets in the Middle Ages. 2006, University Park, Pennsylvania: The Pennsylvania State University Press, 25-
5. Herodotus: Historie, Book 2 (euterpe), 430 BCE: part 125. English Translation of Same. 1890, Macaulay G, London: Macmillan and Co