Chemistry and decomposition of litter from Populus tremuloides Michaux grown at elevated atmospheric CO2 and varying N availability. Global Change Biology. 7:65-74.. 2001.
Clonal variation in above- and below-ground growth responses of Populus tremuloides Michaux : Influence of soil warming and nutrient availability. Plant and Soil. 217(1/2):119-130.. 1999.
Correlation of foliage and litter chemistry of sugar maple, Acer saccharum, as affected by elevated CO2 and varying N availability, and effects on decomposition. Oikos. 94(3):403-416.. 2001.
Fine root chemistry and decomposition in model communities of north-temperate tree species show little response to elevated atmospheric CO2 and varying soil resource availability. Oecologia. 146:318-328.. 2005.
Responses of tree fine roots to temperature. New Phytologist. 147:105-115.. 2000.