Kier, G., Kreft, H., Lee, T. M., Jetz, W., Ibisch, P. L., Nowicki, C., . . . Barthlott, W. (2009). A global assessment of endemism and species richness across island and mainland regions. National Academy of Sciences.

Kier, Gerold, Holger Kreft, Tien Ming Lee, Walter Jetz, Pierre L. Ibisch, Christoph Nowicki, Jens Mutke, et Wilhelm Barthlott. A Global Assessment of Endemism and Species Richness Across Island and Mainland Regions. National Academy of Sciences, 2009.

Kier, Gerold, et al. A Global Assessment of Endemism and Species Richness Across Island and Mainland Regions. National Academy of Sciences, 2009.