@article{ sims2002, author = {Sims, Daniel A. and Gamon, John A.}, title = {Relationships between leaf pigment content and spectral reflectance across a wide range of species, leaf structures and developmental stages}, journal = {Remote Sensing of Environment}, publisher = {}, pages = {337-354}, volume = {81}, number = {2–3}, year = {2002} } @misc{ idb, author = {Henrich, V. and Krauss, G. and Götze, C. and Sandow, C.}, title = {The IndexDatabase}, publisher = {}, address = {Bonn}, pages = {}, volume = {}, number = {}, year = {2011} }