Darwin, C. On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life (J. Murray, 1859). Mayr, E. Systematics and the Origin of Species, from the Viewpoint of a Zoologist (Columbia Univ. Press, 1942). Lehtonen, J., Schmidt, D. J., Heubel, K. & Kokko, H. Evolutionary and ecological implications of sexual …
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