Swabe, Joanna: Animals, Disease and Human Society. Human-Animal-Relations and the Rise of Veterinary Medicine. London 1999. Internet: https://books.google.de/books?id=4WWGAgAAQBAJ&printsec=frontcover&dq=Animals,+Disease+and+Human+Society.+Human-+Animal-Relations+and+the+Rise+of+Veterinary+Medicine.&hl=en&sa=X&ved=0ahUKEwjW0qC-7NPTAhXFuBoKHUExCAwQ6AEIIjAA#v=onepage&q&f=false.