Bowler, Peter J.: Evolution: the history of an idea. 25th anniversary ed. Berkeley, Calif. 2009. Internet: https://books.google.de/books?id=e2b5B0po8fwC&printsec=frontcover&dq=Evolution.+The+History+of+an+Idea.+20th+anniversary+ed.&hl=en&sa=X&ved=0ahUKEwiMjez8kbrTAhXEfxoKHaB6AQ8Q6AEIJjAB#v=onepage&q&f=false.