1. Francisco J. Ayala, “Teleological explanations in evolutionary biology”, in: Philosophy of Science 37, 1970, pp. 1-15.
2. Ned Block and Philip Kitcher, “Misunderstanding Darwin”, in: Boston Review, March/April 2010.
3. Werner Callebaut, Gerd B. Müller and Stuart A. Newman, “The Organismic Systems Approach: Evo-devo and the streamlining of the naturalistic agenda”, in: Roger Sansom and Robert N. Brandon (Eds), Integrating Evolution and Development: From Theory to Practice. Cambridge (MA): MIT Press 2007, pp. 25-92.
4. Charles Darwin, “Abstract of a letter to Asa Gray in ‘On the tendency of species to form varieties; and on the perpetuation of varieties and species by natural means of selection’”, in: Journal of the Proceedings of the Linnean Society of London (Zoology) 3, 1958, pp. 46-50.
5. Charles Darwin, On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life, London: John Murray 1859.