Vigne, L.; Martin, E.B. 2011. The ivory dynasty: A report on the soaring demand for elephant and mammoth ivory in southern China. London, Elephant Family, The Aspinall Foundation and Columbus Zoo and Aquarium. pp. 1-20.
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Vigne, L.; Martin, E.B. 2011. Consumption of elephant and mammoth ivory increases in southern China. Pachyderm 49: 79-89.