Cordeiro, A.L. et al. 2018. Specific Methanogenic Activity: Simplified and automated methodologies for sludge of anaerobic reactors. Revista Verde de Agroecologia e Desenvolvimento Sustentável. 13, 5 (Dec. 2018), 661–665. DOI:https://doi.org/10.18378/rvads.v13i5.6282.