T. Khemwong, W. Chuayjan, S. Khunpetch, P. Kulthong, and V. Malawech, “LABORATORY-SCALE STUDY OF BIOGAS COMPOSITION AND HEATING VALUE FROM CO-DIGESTION OF WATER HYACINTH AND CATTLE MANURE”, Academic Journal of Industrial Technology Innovation, vol. 4, no. 2, pp. 49–65, Aug. 2026.