1. M. E.RehfussandG. M.Nelson: “The Medical Treatment of Gall Bladder Disease” 1936 page17.
2. Philolaos: Quoted byM.Neuburger loco citato page107.
3. AlexanderTraillanus: Quoted byW. J. StewartMcKay loco citato.
4. FabriciusHildanus: Quoted byB. G. A.Moynihan loco citato page343.