1. Baumgartner A, Reichel E (1975) The world water balance. Elsevier, Amsterdam
2. Boyd CE (1985) Pond evaporation. Trans Am Fish Soc 114:299–303
3. Hoekstra AY, Mekonnen MM (2012) The water footprint of humanity. Proc Natl Acad Sci U S A 109:3,232–3,237
4. Hounam CE (1973) Comparisons between pan and lake evaporation. Technical Note 126. World Meteorological Organization, Geneva
5. Klein MJ (1970) Maxwell, his demon and the second law of thermodynamics. Am Sci 58:84–97