Alcon, F., F. Pedrero, J. Martin-Ortega, N. Arcas, J. J. Alarcon, and M. D. de Miguel. “The Non-Market Value of Reclaimed Wastewater for Use in Agriculture: A Contingent Valuation Approach”. Spanish Journal of Agricultural Research, Vol. 8, no. S2, 1, pp. 187-96, doi:10.5424/sjar/201008S2-1361.