@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.} } @book {763, title = {Growth of Norway spruce (Picea abies) in relation to the AOT40 index.}, year = {2002}, type = {Background paper presented at the UNECE Workshop Establishing Ozone Critical Levels II, Goteborg November 2002}, author = {Skarby, L. and Ottoson, S. and Karlsson, P.E. and Wallin, G. and Sellden, G. and Medin, E. and Pleijel, H.} }