1. [DJTP] Direktorat Jenderal Tanaman Pangan, Kementrian Pertanian. 2010. Pedoman pelaksanaan perlindungan tanaman pangan tahun 2010 [internet]. [download 2012 Nov 22] from. http://tanamanpangan.deptan.go.id/doc_upload/PEDOMAN%2520PELAKSANAAN%2520PROGRAM.pdf. In Bahasa.
2. Estimating the foliar biochemical concentration of leaves with reflectance spectrometry testing the kokaly and CClark Methologies;Curran;Remote Sensing of Environment.,2001
3. Huber S, Kneubunher M, Zimermann NE, Itten K. 2005. Potential of spectral feature analysis to estimate nitrogen concentration in mixed canopies.
4. High spectral resolution remote sensing of forest canopy lignin, nitrogen, and ecosystem processes;Martin;Ecological Applications.,1997
5. Strategies for developing green super rice;Zhang;Proc.Natl.acad.Sci.USA.,2007