Reliability of the estimation of vegetation characteristics by inversion of three canopy reflectance models on airborne POLDER data Cédric Bacour, Stéphane Jacquemoud, Marc Leroy, Olivier Hautecœur, Marie Weiss, Laurent Prévot, Nadine Bruguier and Habiba Chauki Agronomie, 22 6 (2002) 555-565 DOI: 10.1051/agro:2002039