E. Najafi, I. Pal, and R. Khanbilvardi. Clustering and Trend Analysis of Global Extreme Droughts from 1900 to 2014. Science and Technology Infusion Climate Bulletin NOAA’s National Weather Service, 2018. DOI: 10.7289/V5/CDPW-NWS-42nd-2018.
E. Najafi, I. Pal, and R. Khanbilvardi. Clustering and Trend Analysis of Global Extreme Droughts from 1900 to 2014. Science and Technology Infusion Climate Bulletin NOAA’s National Weather Service, 2018. DOI: 10.7289/V5/CDPW-NWS-42nd-2018.