1. Species, lineages, splitting, and divergence: why we still need ‘anagenesis’ and ‘cladogenesis’;Allmon;Biological Journal of the Linnean Society,2017
2. Patrick Matthew—forest geneticist (1790–1874);Barker;Forest History Today,2001
3. Wallace, Darwin, and the theory of natural selection;Beddall;Journal of the History of Biology,1968
4. Darwin and divergence: the Wallace connection;Beddall;Journal of the History of Biology,1988