Wesley W. Wettengel

Terrestrial Ecoregions of the World: A New Map of Life on Earth

G. Powell, E. Wikramanayake, J. Lamoreux, 2001 .

Pinpointing and preventing imminent extinctions.

Michael Hoffmann, Robin Naidoo, Stuart H M Butchart, 2005, Proceedings of the National Academy of Sciences of the United States of America.

The efficacy of TM satellite imagery for rapid assessment of Chihuahuan xeric habitat intactness for ecoregion-scale conservation planning

D. Olson, Thomas F. Allnutt, Wesley W. Wettengel, 2002 .