Assessment of areal interpolation methods for spatial analysis of SPI and EDI drought indices.Published in:International Journal of Climatology, 2009, v. 29, n. 1, p. 135, doi. 10.1002/joc.1691By:Akhari, Rouhangiz;Morid, saed;Mahdian, Mohammad Hossain;Smakhtin, VladimirPublication type:Article