8Budyko M I. Climate and life [M]. New York: Academic, 1974.
9Zhang L, Hickel K, Dawes W R, et al. A rational function approach for estimating mean annual evapotranspiration [J ]. Water Resources Research, 2004, 40(2): W02502, 1.
10Yang D, Sun F, Liu Z, et al. Analyzing spatial and temporal variability of annual water-energy balance in nonhumid regions of China using the Budyko hypothesis [J]. Water Resources Research, 2007, 43 (4) W04426, 1.