1. [1] Allen R.G., Pereira L.S., Raes D., Smith M., Crop evapotranspiration guidelines for computing crop water requirements, FAO Irrigation and Drainage Paper 56, Italy, Rome, 1998.
2. [2] Almorox J., Senatore A., Quej V.H., Mendicino G., Worldwide assessment of the Penman�Monteith temperature approach for the estimation of monthly reference evapotranspiration. Theoretical and Applied Climatology, vol. 131/issue 1�2, pp 693� 703, 2018.
3. [3] Bautista F., Bautista D., Delgado-Carranza C., Calibration of the equations of Hargreaves and Thornthwaite to estimate the potential evapotranspiration in semi�arid and subhumid tropical climates for regional applications, Atmosfera, vol. 22/issue 4, pp 331�348, 2009.
4. [4] Camargo A.P., Marin F.R., Sentelhas P.C., Picini A.G., Adjust of the Thornthwaite�s method to estimate the potential evapotranspiration for arid and superhumid climates, based on daily temperature amplitude, Revista Brasileira de Agrometeorologia, vol. 7/issue 2, pp 251-257, 1999. (in Portuguese with English summary)
5. [5] Farzanpour, H., Shiri, J., Sadraddini, A. A., Trajkovic, S., Global comparison of 20 reference evapotranspiration equations in a semi-arid region of Iran, Hydrology Research, vol. 50/issues 1, pp 282-300, 2019.