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Cerling, Thure E., Janet E. Barnette, Lesley A. Chesson, Iain Douglas-Hamilton, Kathleen S. Gobush, Kevin T. Uno, Samuel K. Wasser, und Xiaomei Xu. "Radiocarbon Dating of Seized Ivory Confirms Rapid Decline in African Elephant Populations and Provides Insight Into Illegal Trade." Proc Natl Acad Sci U S A 2016.

Cerling, Thure E., et al. "Radiocarbon Dating of Seized Ivory Confirms Rapid Decline in African Elephant Populations and Provides Insight Into Illegal Trade." Proc Natl Acad Sci U S A 2016.