Berhanu, D., and T. Assefa. “Willingness to Pay for the Ecosystem Conservation: The Case of Lake Hora, Bishoftu, Ethiopia”. Journal of Forestry and Natural Resources, vol. 1, no. 2, Aug. 2022, pp. 16-28, https://journals.hu.edu.et/hu-journals/index.php/jfnr/article/view/204.