Aeschlimann, U., Nosberger, J., Edwards, P.J., Schneider, M.K., Richter, M. and Blum, H.  2005.  Responses of net ecosystem CO2 exchange in managed grassland to long-term CO2 enrichment, N fertilization and plant species.  Plant, Cell and Environment 28: 823-833.

Almeida, J.P.F., Luscher, A., Frehner, M., Oberson, A. and Nosberger, J.  1999.  Partitioning of P and the activity of root acid phosphatase in white clover (Trifolium repens L.) are modified by increased atmospheric CO2 and P fertilisation.  Plant and Soil 210: 159-166.

Clark, H., Newton, P.C.D. and Barker, D.J.  1999.  Physiological and morphological responses to elevated CO2 and a soil moisture deficit of temperate pasture species growing in an established plant community.  Journal of Experimental Botany 50: 233-242.

Dale, H. and Press, M.C.  1998.  Elevated atmospheric CO2 influences the interaction between the paraxitic angiosperm Orobanche minor and its host Trifolium repens.  New Phytologist 140: 65-73.

Davey, P.A., Parsons, A.J., Atkinson, L., Wadge, K. and Long, S.P.  1999.  Does photosynthetic acclimation to elevated CO2 increase photosynthetic nitrogen-use efficiency? A study of three native UK grassland species in open-top chambers.  Functional Ecology 13: 21-28.

Greer, D.H., Laing, W.A., Campbell, B.D. and Halligan, E.A.  2000.  The effect of perturbations in temperature and photon flux density on the growth and photosynthetic responses of five pasture species to elevated CO2.  Australian Journal of Plant Physiology 27: 301-310.

Lehnherr, B., Machler, F. and Nosberger, J.  1985.  Effect of CO2 concentration during growth on a CO2 concentrating mechanism in white clover as predicted from differential ¹⁴CO2/¹²CO2 uptake.  Journal of Experimental Botany 36: 1835-1841.

Newton, P.C.D., Clark, H., Bell, C.C., Glasgow, E.M., Tate, K.R., Ross, D.J., Yeates, G.W. and Saggar, S.  1995.  Plant growth and soil processes in temperate grassland communities at elevated CO2.  Journal of Biogeography 22: 235-240.

Nijs, I., Impens, I. and Behaeghe, T.  1988.  Effects of elevated atmospheric carbon dioxide on gas exchange and growth of white clover.  Photosynthesis Research 15: 163-176.

Overdieck, D. and Bossemeyer, D.  1985.  Longterm effects of CO2 enrichment on CO2 gas exchange of a model- ecosystem.  Angewandte Botanik 59: 179-198.

von Caemmerer, S., Ghannoum, O., Conroy, J.P., Clark, H. and Newton, P.C.D. 2001. Photosynthetic responses of temperate species to free air CO2 enrichment (FACE) in a grazed New Zealand pasture. Australian Journal of Plant Physiology 28: 439-450.