Cioc, Mark: The game of conservation: international treaties to protect the world’s migratory animals. Athens 2009. Internet: https://books.google.de/books?id=ob42uyPdnOgC&printsec=frontcover&dq=The+Game+of+Conservation.+International+Treaties+to+Protect+the+World%E2%80%99s+Migratory+Animals&hl=en&sa=X&ved=0ahUKEwjKntuByK3TAhXKfFAKHSXOANIQ6AEIJDAA#v=onepage&q&f=false. Zuletzt geprüft am: 18.4.2017.