Thongsri, P., Pasom, W., Rupitak, Q., and Srisaikham, S. “Fabrication of biogas production prototypes from cattle manure on smallholder farm into renewable energy in a balanced and sustainable manner”. International Journal of Agricultural Technology, vol. 21, no. 5, Sept. 2025, pp. 2045-66, doi:10.63369/ijat.2025.21.5.2045-2066.