Gould, S. J., Gilinsky, N. L., and German, R. Z., 1987, Asymmetry of lineages and the directions of evolutionary time: Science, v. 236, p. 1437-1441.
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Gould, S. J., Gilinsky, N. L., and German, R. Z., 1987, Asymmetry of lineages and the directions of evolutionary time: Science, v. 236, p. 1437-1441.