T. Rajasivaranjan, N.R. Patel, A. Ponraj, V. Kumar, and U. Surendran. 2019. “Development and Application of SPI Generator Using Open Source for Analyzing Drought at a Varying Time Scale”. Journal of Agrometeorology 21 (4):420-26. https://doi.org/10.54386/jam.v21i4.276.