Michael Denton, Evolution: A Theory in Crisis, London: Burnett Books, 1985, стр. 351.
52
John Horgan, "In the Beginning", Scientific American том 264, февраль 1991, стр. 119.
53
G.F. Joyce, L. Е. Orgel, "Prospects for Understanding the Origin of the RNA World", In the RNA World, New York: Cold Spring Harbor Laboratory Press, 1993, стр. 13.
