NDYABAWE, Kenneth; KISAALITA, William S. Validity of the Africa-wide Lang factor of 2.63 for estimating small biogas plant installation costs in Uganda. International Journal of Agricultural and Biological Engineering, [S. l.], v. 7, n. 1, p. 70–76, 2014. Disponível em: https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/880. Acesso em: 26 dec. 2025.