@article{ malthus1993, author = {Malthus, Tim J. and Andrieu, Bruno and Danson, F. Mark and Jaggard, Keith W. and Steven, Michael D.}, title = {Candidate high spectral resolution infrared indices for crop cover}, journal = {Remote Sensing of Environment}, publisher = {}, pages = {204-212}, volume = {46}, number = {2}, year = {1993} } @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} }