Maragni LA, Knapp AK, McAllister CA. Patterns and determinants of potential carbon gain in the C3 evergreen Yucca glauca (Liliaceae) in a C4 grassland. American Journal of Botany. 2000;87:230 -236. Available at: http://www.amjbot.org/content/87/2/230.short.

Knapp AK, Bargman N, Maragni LA, et al. Elevated CO2 and leaf longevity in the C4 grassland dominant Andropogon gerardii. International Journal of Plant Sciences. 1999;160:1057 -1061. doi:10.1086/314202.

McAllister CA, Knapp AK, Maragni LA. Is leaf-level photosynthesis related to plant success in a highly productive grassland?. Oecologia. 1998;117:40 -46. doi:10.1007/s004420050629.

Maragni LA. Ecophysiology and demography of Yucca glauca  in the central Great Plains.  1997;MS Thesis:1 -76.