@article{ gitelson2002, author = {Gitelson, A. A. and Kaufman, Y. J. and Stark, R. and Rundquist, D.}, title = {Novel algorithms for remote estimation of vegetation fraction}, journal = {Remote Sensing of Environment}, publisher = {}, pages = {76-87}, volume = {80}, number = {1}, 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} }