Z. Duojiao, D. Na, L. Cong, Z. Yilin, X. Qiuzi, and L. Zhidan, “Empirical analysis of mass flow and operation performance of a full-scale biogas plant for human feces treatment”, Int J Agric & Biol Eng, vol. 10, no. 2, pp. 233–241, Mar. 2017.