J. M. . Kimathi, B. . Orori, and L. . Etiégni, “Co-Digestion Performance of Chicken Droppings, Fruit and Vegetable Wastes, and Slaughterhouse Residues in Biogas Production”, J. Sustain. Eng. Renew. Energy., vol. 2, no. 2, pp. 33–39, Oct. 2026, doi: 10.54536/jsere.v2i2.8675.