Barnard, R., Barthes, L., Le Roux, X. and Leadley, P.W. 2004. Dynamics of nitrifying activities, denitrifying activities and nitrogen in grassland mesocosms as altered by elevated CO2. New Phytologist 162: 365-376.

Barnard, R., Leadley, P.W., Lensi, R. and Barthes, L. 2005. Plant, soil microbial and soil inorganic nitrogen responses to elevated CO2: a study in microcosms of Holcus lanatus. Acta Oecologica 27: 171-178.

Hunt, R., Hand, D.W., Hannah, M.A. and Neal, A.M. 1991. Response to CO2 enrichment in 27 herbaceous species. Functional Ecology 5: 410-421.

Jongen, M. and Jones, M.B. 1998. Effects of elevated carbon dioxide on plant biomass production and competition in a simulated neutral grassland community. Annals of Botany 82: 111-123.

Maestre, F.T. and Reynolds, J.F. 2007. Biomass responses to elevated CO2, soil heterogeneity and diversity: an experimental assessment with grassland assemblages. Oecologia 151: 512-520.

Soussana, J.-F., Teyssonneyre, F., Picon-Cochard, C. and Dawson, L. 2005. A trade-off between nitrogen uptake and use increases responsiveness to elevated CO2 in infrequently cut mixed C3 grasses. New Phytologist 166: 217-230.

Teyssonneyre, F., Picon-Cochard, C. and Soussana, J.F. 2002. How can we predict the effects of elevated CO2 on the balance between perennial C3 grass species competing for light? New Phytologist 154: 53-64.