DE ALWIS, A. A Tool for Sustainability: A Case for Biogas in Sri Lanka. Journal of Tropical Forestry and Environment, [S. l.], v. 2, n. 1, 2012. DOI: 10.31357/jtfe.v2i1.564. Disponível em: https://journals.sjp.ac.lk/index.php/JTFE/article/view/564. Acesso em: 3 may. 2024.