Structure, spatial distribution and competition in mixed jack pine (Pinus banksiana) stands on clay soils of eastern Canada Martin Béland, Jean-Martin Lussier, Yves Bergeron, Marie-Hélène Longpré and Michel BélandAnn. For. Sci., 60 7 (2003) 609-617DOI: https://doi.org/10.1051/forest:2003053