Assessment of the effects of below-zero temperatures on photosynthesis and chlorophyll a fluorescence in leaf discs of Eucalyptus globulus L. F. Serrano, M. M. Chaves, M. H. Almeida and J. S. PereiraAnn. For. Sci., 46 Supplement (1989) 617s-620sDOI: https://doi.org/10.1051/forest:198905ART0139