PAULA JR, D. R. D., ROSTON, D. M., NOUR, E. A., MORAES, L. M. and CAMARGO, S. A. R. D. (2008) “ANAEROBIC DIGESTION OF SEWAGE SLUDGE USING SEQUENTIAL REACTORS: START- UP AND SYSTEMS STABILIZATION ”, Revista Brasileira de Engenharia de Biossistemas. Tupã, São Paulo, Brazil, 2(2), pp. 91–97. doi: 10.18011/bioeng2008v2n2p91-97.