@article{ gamon1992, author = {Gamon, J. A. and Peñuelas, J. and Field, C. B.}, title = {A narrow-waveband spectral index that tracks diurnal changes in photosynthetic efficiency}, journal = {Remote Sensing of Environment}, publisher = {}, pages = {35-44}, volume = {41}, number = {1}, year = {1992} } @article{ nichol2000, author = {Nichol, Caroline J. and Huemmrich, Karl F. and Black, T. Andrew and Jarvis, Paul G. and Walthall, Charles L. and Grace, John and Hall, Forrest G.}, title = {Remote sensing of photosynthetic-light-use efficiency of boreal forest}, journal = {Agricultural and Forest Meteorology}, publisher = {}, pages = {131-142}, volume = {101}, number = {2–3}, year = {2000} } @article{ penuelas1997, author = {Penuelas, J. and Llusia, J. and Pinol, J. and Filella, I.}, title = {Photochemical reflectance index and leaf photosynthetic radiation-use-efficiency assessment in Mediterranean trees}, journal = {International Journal of Remote Sensing}, publisher = {}, pages = {2863-2868}, volume = {18}, number = {13}, year = {1997} } @article{ strachan2002, author = {Strachan, Ian B. and Pattey, Elizabeth and Boisvert, Johanne B.}, title = {Impact of nitrogen and environmental conditions on corn as detected by hyperspectral reflectance}, journal = {Remote Sensing of Environment}, publisher = {}, pages = {213-224}, volume = {80}, number = {2}, 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} }