SETIAWATI, D. .; DIKSY, Y.; TIRTA, A. P. . Performance test for COD determination in wastewater using a closed reflux method with a COD reactor. Indonesian Journal of Applied Environmental Studies, [S. l.], v. 6, n. 1, p. 20–25, 2025. DOI: 10.33751/injast.v6i1.5. Disponível em: https://injast-pasca.unpak.ac.id/index.php/InJAST/article/view/5. Acesso em: 13 sep. 2025.