Diversity of water use efficiency among Quercus robur genotypes: contribution of related leaf traits Magali Roussel, Didier Le Thiec, Pierre Montpied, Nathalie Ningre, Jean-Marc Guehl and Oliver BrendelAnn. For. Sci., 66 4 (2009) 408DOI: https://doi.org/10.1051/forest/2009010