Islam, K., S. Anusontpornperm, I. Kheoruenromne, and S. Thanachit. “Carbon Sequestration in Relation to Topographic Aspects and Land Use in Northeast of Thailand”. International Journal of Environment and Climate Change, Vol. 8, no. 2, June 2018, pp. 118-37, doi:10.9734/ijecc/2018/v8i227150.