Using cover measurements to estimate aboveground understorey biomass in Maritime pine stands Annabel J. Porté, Jean-Charles Samalens, Raphaël Dulhoste, Rémi Teissier Du Cros, Alexandre Bosc and Céline MeredieuAnn. For. Sci., 66 3 (2009) 307DOI: https://doi.org/10.1051/forest/2009005