A. L. Cordeiro, D. S. Móller, J. da C. F. Dutra, A. T. S. de Carvalho, and C. L. de Souza, “Specific Methanogenic Activity: Simplified and automated methodologies for sludge of anaerobic reactors”, Green Journal, vol. 13, no. 5, pp. 661–665, Dec. 2018.