Maestre-Valero, J.F., Martínez-Alvarez, V. and González-Real, M.M. 2013. Regionalization of the Hargreaves coefficient to estimate long-term reference evapotranspiration series in SE Spain. Spanish Journal of Agricultural Research. 11, 4 (Oct. 2013), 1137-1152. DOI:https://doi.org/10.5424/sjar/2013114-3869.