Ziemer, C. J., B. J. Kerr, S. L. Trabue, H. H. Stein, D. A. Stahl, and S. K. Davidson. 2009. Dietary protein and cellulose effects on chemical and microbial characteristics of swine feces and stored manure. J. Env. Qual. 38:2138-2146. Link to full text (.pdf)