@article{ carter1994, author = {Carter, Gregory A.}, title = {Ratios of leaf reflectances in narrow wavebands as indicators of plant stress}, journal = {International Journal of Remote Sensing}, publisher = {Taylor & Francis}, pages = {697-703}, volume = {15}, number = {3}, year = {1994} } @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} }