Chinh, P. C., N. T. Hung, N. M. Ky, N. T. Ai, and N. M. Tam. “Willingness to Pay for Improving Household Solid Waste Management in Vietnam”. Applied Environmental Research, vol. 43, no. 2, Mar. 2021, pp. 1-14, doi:10.35762/AER.2021.43.2.1.