K.N. Singh, Rajeev Ranjan Kumar, and Mrinmoy Ray. “ Wavelet Extreme Learning Machine (W-ELM) Model for Drought Index Forecasting”. Journal of the Indian Society of Agricultural Statistics 77, no. 02 (September 4, 2025): 185–192. Accessed June 28, 2026. https://epubs.icar.org.in/index.php/JISAS/article/view/171431.