Meng-Lung Lin and  Qiubing Wang and  Fujun Sun and  Tzu-How Chu and  Yi-Shiang Shiu,  Quick Spatial Assessment of Drought Information Derived from MODIS Imagery Using Amplitude Analysis.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2010, vol. 43(7). 271 - 275
    [viewed 27 January 2020]. Available from: https://publications.waset.org/pdf/7720.