Alexander, J. M., Kueffer, C., Daehler, C. C., Edwards, P. J., Pauchard, A., & Seipel, T. (2011). Assembly of nonnative floras along elevational gradients explained by directional ecological filtering. National Academy of Sciences.

Alexander, Jake M., Christoph Kueffer, Curtis C. Daehler, Peter J. Edwards, Aníbal Pauchard, and Tim Seipel. Assembly of Nonnative Floras Along Elevational Gradients Explained By Directional Ecological Filtering. National Academy of Sciences, 2011.

Alexander, Jake M., et al. Assembly of Nonnative Floras Along Elevational Gradients Explained By Directional Ecological Filtering. National Academy of Sciences, 2011.