1. Wang, L.K.,Hung, Y.-T.,Lo, H.H., & Yapijakis, C. (Eds.) ( 2006). Waste treatment in the food processing industry, New York: CRC Press.
2. Biological treatment of mixed industrial wastewaters in a fluidised bed reactor;Ochieng;Journal of Hazardous Materials,2003
3. United States Department of Agriculture, Dairy Market Statistics 2007 Annual Summary, http://www.ams.usda.gov/dairy/mncs/weekly.html (accessed, September 2008).
4. Hamilton, R.B.( 2006). Processing waste material produced from dairy industry for recovering fat useful as biodiesel and protein useful as feed supplement. (Fonterra Co-Operative Group Limited, N.Z.) PCT International Application, 21.
5. Optimization of propionic acid production by Propionibacterium acidipropionici through enzyme inhibition;Morales;Environmental Progress,2006