@article {1452, title = {Derivation of ozone flux-yield relationships for lettuce: a key horticultural crop.}, journal = {Environmental Pollution}, volume = {146}, year = {2007}, pages = {699-706}, author = {Goumenaki, E. and Fernandez, I. G. and Papanikolaou, A. and Papadopoulou, D. and Askianakis, C. and Kouvarakis, G. and Barnes, J.} }