"ID" "Type" "Author" "Title" "Publication" "Publisher" "Year" "Date" "Location" "Pages" "Volume" "Issue" "SerialNr" "URL" "DOI" "pe_uelas1994" "JOUR" "Peñuelas, J.; Gamon, J. A.; Fredeen, A. L.; Merino, J.; Field, C. B." "Reflectance indices associated with physiological changes in nitrogen- and water-limited sunflower leaves" "Remote Sensing of Environment" "" "1994" "" "" "135-146" "48" "2" "0034-4257" "http://www.sciencedirect.com/science/article/pii/0034425794901368" "10.1016/0034-4257(94)90136-8" "idb" "ELEC" "Henrich, V.; Krauss, G.; Götze, C.; Sandow, C." "The IndexDatabase" "" "" "2011" "2011" "Bonn" "" "" "" "" "https://www.indexdatabase.de/" ""