VERMA, I. . J. ., V. N. . JADHAV, and E. R. . S. “Recent Variations and Trends in Potential Evapotranspiration (PET) over India”. MAUSAM, vol. 59, no. 1, Jan. 2008, pp. 119-28, doi:10.54302/mausam.v59i1.1217.