Kurt S. Creamer Creamer, K. S., Williams, C. M., Chen, Y., & Cheng, J. J. (2008). Implications of urine-to-feces ratio in the thermophilic anaerobic digestion of swine waste. WATER ENVIRONMENT RESEARCH, 80(3), 267–275. https://doi.org/10.2175/106143007X184717 Chen, Y., Cheng, J. J., & Creamer, K. S. (2008). [Review of Inhibition of anaerobic digestion process: A review]. BIORESOURCE TECHNOLOGY, 99(10), 4044–4064. https://doi.org/10.1016/j.biortech.2007.01.057