Giler, J. J. G., and C. N. P. Cedeño. “Elaboration of Bovine Manure Biodigester for Biogas Transformation to Electric Power”. International Research Journal of Management, IT and Social Sciences, vol. 7, no. 5, Aug. 2020, pp. 32-37, doi:10.21744/irjmis.v7n5.967.