Zekri, S., S. Al Harthi, H. Kotagama, and S. Bose. “An Estimate of the Willingness to Pay for Treated Wastewater for Irrigation in Oman”. Journal of Agricultural and Marine Sciences [JAMS], vol. 21, Jan. 2016, pp. 57-64, doi:10.24200/jams.vol21iss0pp57-64.