P.K. KINGRA, S. AATRALARASI, RAJ SETIA, S.S. KUKAL, and SOM PAL SINGH. “Computation of Reference Evapotranspiration, Its Variability and Trends in Different Agroclimatic Regions of Punjab”. Journal of Agrometeorology, vol. 22, no. 2, June 2020, pp. 226-32, doi:10.54386/jam.v22i2.176.