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Swain, S.; et al. Application of SPI, EDI and PNPI using MSWEP precipitation data over Marathwada, India. 2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS). July 2017, 2017: 5505–5507. ISBN 978-1-5090-4951-6. S2CID 26920225. doi:10.1109/IGARSS.2017.8128250.
Guhathakurta, Pulak; Saji, Elizabeth. Detecting changes in rainfall pattern and seasonality index vis-à-vis increasing water scarcity in Maharashtra. Journal of Earth System Science. 1 June 2013, 122 (3): 639–649. S2CID 132556072. doi:10.1007/s12040-013-0294-y.