Rahmat, Siti Nazahiyah, Niranjali Jayasuriya, and Muhammed Bhuiyan. “Identification of Homogeneous Areas for Drought Frequency Analysis”. International Journal of Integrated Engineering 9, no. 2 (April 10, 2017). Accessed April 1, 2020. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/1510.