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A probabilistic definition of a species, fuzzy boundaries and ‘sigma taxonomy’Thackeray, J. Francis; Schrein, Caitlin M. · South African Journal of Science · 2017
Beyond Gorilla and Pongo: Alternative models for evaluating variation and sexual dimorphism in fossil hominoid samplesJeremiah E. Scott; Caitlin M. Schrein; Jay Kelley · 2009