CURT, T., et al. “Influence of Geopedological Conditions on the Root System and Height Growth of Douglas Fir in the Monts Du Beaujolais Area (France)”. Sciences Eaux & Territoires, no. 16 Ingénieries-EAT, Dec. 1998, pp. 29-46, https://revue-set.fr/article/view/5751.