2001
"The Sixth Extinction" http://www.actionbioscience.org/newfrontiers/eldredge2.html, an ActionBioscience.org original article
Niles Eldredge: Citáty anglicky
Time Frames: The Rethinking of Darwinian Evolution and the Theory of Punctuated Equilibria, Simon & Schuster: New York NY, 1985, pp.188-189