@article {494, title = {Potential effects of rising tropospheric concentrations of CO2 and O-3 on green-algal lichens}, journal = {New Phytologist }, volume = {132}, year = {1996}, pages = {132, 641-652.}, author = {Balaguer, M. and Valladares, F. and Ascaso, C. and Barnes, J.D. and DelosRios, A. and Manrique, E. and Smith, E.C.} }