1. Gangopadhyay M, Harbeck JG, Nordenson TJ, Omar MH, Uryvaev VA. Measurement and estimation of evaporation and evapotranspiration. report of the CIMO working group on evaporation measurement, 1966; WMO No. 201, p. 121.
2. Natural evaporation from open water, bare soil, and grass;Penman;Proc R Soc Lond,1948
3. Stephens JC, Stewart EH. A comparison of procedures for computing evaporation and evapotranspiration. In: Publication 62 International Association of Scientific Hydrology International Union of Geodynamics and Geophysics, Berkeley, CA; 1963, p. 123–33.
4. Another evaporation formula;Griffiths;Agric Meteorol,1966