1. Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables;Abramowitz,1964
2. Log-logistic flood frequency analysis;Ahmad;Journal of Hydrology,1988
3. Crop Evapotranspiration — Guidelines for Computing Crop Water Requirements. FAO Irrigation and Drainage Paper 56;Allen,1998
4. Drought under global warming: A review;Dai;Wiley Interdisciplinary Reviews: Climate Change,2011
5. Estimating reference evapotranspiration under inaccurate data conditions;Droogers;Irrigation and Drainage Systems,2002