The worldwide leaf economics spectrum. - Wright,I..J..; Reich,P..B..; Westoby,M..; Ackerly,D..D..; Baruch,Z..; Bongers,F..; Cavender-Bares,J..; Chapin,T..; Cornelissen,J..H..C..; Diemer,M..; Flexas,J..; Garnier,E..; et al. (Nature, 2004)