Ziska, L.H.; Reeves III, J.B.; Blank, R.R. (2005), "The impact of recent increases in atmospheric CO2 on biomass production and vegetative retention of cheatgrass (B. tectorum): Implications for fire disturbance.", Global Change Biology.11 (8): 1325–1332, doi:10.1111/j.1365-2486.2005.00992.x