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Froyd, Cynthia A.; Coffey, Emily E. D.; van der Knaap, Willem Oscar; van Leeuwen, Jacqueline F. N.; Tye, Alan; Willis, Katherine J. (2014). The ecological consequences of megafaunal loss: giant tortoises and wetland biodiversity. Ecology Letters, 17(2), pp. 144-154. Wiley-Blackwell Publishing 10.1111/ele.12203
van Leeuwen, Jacqueline; Froyd, Cynthia A.; van der Knaap, Willem Oscar; Coffey, Emily E.; Tye, Alan; Willis, Katherine J. (2008). Fossil Pollen as a Guide to Conservation in the Galapagos (Brevia). Science, 5905(322), p. 1206. Washington, D.C.: American Association for the Advancement of Science 10.1126/science.1163454
