The effect of elevated carbon dioxide and ozone on leaf- and branch-level photosynthesis and potential plant-level carbon gain in aspen, Asko Noormets, Evan P. McDonald, Richard E. Dickson, Eric L. Kruger, Anu Sôber, J. Isebrands, David F. Karnosky
Michigan Tech Publications

Fine-root biomass and fluxes of soil carbon in young stands of paper birch and trembling aspen as affected by elevated atmospheric CO < inf> 2 and tropospheric O < inf> 3, J. King, K. Pregitzer, D. Zak, J. Sober, J. Isebrands, R. Dickson, G. Hendrey, D. F. Karnosky
Michigan Tech Publications