@article {1488, title = {New stomatal flux-based critical levels for ozone effects on vegetation.}, journal = {Atmospheric Environment}, volume = {45}, year = {2011}, pages = {5064-5068}, author = {Mills, G. and Pleijel, H. and Braun, S. and Buker, P. and Bermejo, V. and Calvo, E. and Danielsson, H. and Emberson, L. and Gonzalez Fernandez, I. and Grunhage, L. and Harmens, H. and Hayes, F. and Karlsson, P.E. and Simpson, D.} } @article {1502, title = {Differential ozone sensitivity in an old and a modern Swedish wheat cultivar {\textendash} grain yield and quality, leaf chlorophyll and stomatal conductance.}, journal = {Environmental and Experimental Botany}, volume = {56}, year = {2006}, pages = {63-71}, author = {Pleijel, H. and Eriksen, A.B. and Danielsson, H. and Bondesson, N. and Sellden, G.} }