Comparison of biomass and nutrient content between oak (Quercus petraea) and hornbeam (Carpinus betulus) trees in a coppice-with-standards stand in Chimay (Belgium) Frédéric André and Quentin PonetteAnn. For. Sci., 60 6 (2003) 489-502DOI: https://doi.org/10.1051/forest:2003042