Sujan, S., M. Bashar, M. Rahaman, M. Haque, M. Miah, M. Jamal, and S. Banik. “Optimization of Aeration Technique for the Reduction of Impurities (Corrosive Gases) from Biogas”. Bangladesh Journal of Scientific and Industrial Research, vol. 46, no. 3, Nov. 2011, pp. 339-42, doi:10.3329/bjsir.v46i3.9040.