1. Wynne-Edwards, V. C. (1986), Evolution Through Group Selection (Oxford: Blackwell)
2. Survival of Young Swifts in Relation to Brood-size
3. Sober, E, and Wilson, D. S. (1998), Unto Others: The Evolution and Psychology of Unselfish Behavior (Cambridge, MA: Harvard University Press)
4. Darwinian Naturalism, Theism, and Biological Design;Shanahan;Perspectives on Science and Christian Faith,1997
5. The conundrum of the honey bees: One impediment to the publication of Darwin's theory