Modelling juvenile-mature wood transition in Scots pine (Pinus sylvestris L.) using nonlinear mixed-effects models Rüdiger Mutz, Edith Guilley, Udo H. Sauter and Gérard NepveuAnn. For. Sci., 61 8 (2004) 831-841DOI: https://doi.org/10.1051/forest:2004084