Polyphenolic and enzymatic characterization of ageing and rejuvenation of hybrid walnut trees (Juglans nigra x Juglans regia): relationship to growth C. Jay-Allemand, A. Drouet, A. Ouaras and D. CornuAnn. For. Sci., 46 Supplement (1989) 190s-193sDOI: https://doi.org/10.1051/forest:19890544