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- Phytosociological, bioclimatic and biogeographical classification of woody climax communities of western North America. Journal of Vegetation Science, 8: 505-528. 1997.
- A phytosociological survey of the boreal forest (Vaccinio-Piceetea) in North America. Plant Ecology 137: 151-202. 1997.
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- Plant associations of the El Vizcaíno Biosphere Reserve, Baja California, México. The Southwestern Naturalist, 50(2): 129-149. 2005.
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- Major plant communities of North America’s most arid region: the San Felipe Desert, Baja California, Mexico. Plant Biosystems 140(3): 280-296. 2006
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- Statistical measures of fidelity applied to diagnostic species in plant sociology. Modern Applied Science 7 (6): 106-120. 2013
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