1. Willingness to pay for renewable energy: Evidence from a contingent valuation survey in Kenya;Abdullah;Renewable & Sustainable Energy Reviews,2011
2. Environmental preservation, uncertainty, and irreversibility;Arrow,1974
3. Irrigation potential in Ethiopia: Constraints and opportunities for enhancing the system;Awulachew;Unpublished Report to the Bill and Melinda Gates Foundation,2010
4. Impact of small-scale irrigation on household poverty: Empirical evidence from the Ambo district in Ethiopia;Bacha;Irrigation and Drainage,2011
5. Bateman, I. J., Carson, R. T., Day, B., Hanemann, M., Hanley, N., Hett, T., ... Swanson, J. (2002). Economic Valuation with Stated Preference Techniques: A Manual: Edward Elgar. 458 pp.