Ambrose, Lisa (March 2003). "Emergence of the Introduced Grass Agropyron cristatum and the Native Grass Bouteloua gracilis in a Mixed-grass Prairie Restoration". Restoration Ecology. 11 (1): 110–115. Bibcode:2003ResEc..11..110A. doi:10.1046/j.1526-100X.2003.00020.x.
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Ambrose, Lisa (March 2003). "Emergence of the Introduced Grass Agropyron cristatum and the Native Grass Bouteloua gracilis in a Mixed-grass Prairie Restoration". Restoration Ecology. 11 (1): 110–115. Bibcode:2003ResEc..11..110A. doi:10.1046/j.1526-100X.2003.00020.x.