L. Da Costa, J. Moghrabi, A. Sagula, and J. D. L. Junior, “ANAEROBIC TREATMENT OF WATER WITH REFRIGERATOR USE OF WASTEWATER DIGESTERS: USE OF BIOLOGICAL REMEDIATION FOR PRODUCTION OF BIOGAS”, Braz J Biosyst Eng, vol. 7, no. 2, pp. 77–85, Dec. 2013.