Spatial and seasonal variations in stem respiration of beech trees (Fagus sylvatica) Éric Ceschia, Claire Damesin, Stéphanie Lebaube, Jean-Yves Pontailler and Éric DufrêneAnn. For. Sci., 59 8 (2002) 801-812DOI: https://doi.org/10.1051/forest:2002078