@article {719, title = {The effect of long-term elevated ozone concentrations on the growth and photosynthesis of Sphagnum recurvum and Polytrichum commune}, journal = {New Phytologist}, volume = {134}, year = {1996}, pages = {649-656}, author = {Potter, L. and Foot, J.P. and Caporn, S.J.M and Lee, J.A.} }