Okeniyi, J. O., A. O. Ogunsanwo, N. W. Odiase, U. E. Obiajulu, and E. T. Okeniyi. “CH4 Emission Model from Bos Primigenius Waste in Fish-Water: Implications for Integrated Livestock-Fish Farming Systems”. Journal of Engineering and Technological Sciences, vol. 45, no. 2, July 2013, pp. 153-65, doi:10.5614/j.eng.technol.sci.2013.45.2.4.